4549) “4 Seasons – Summer ("4 Seasons Serie)” 2026, Swiss Mint, Switzerland: 20-Franc Silver Special Coin: Date/Year of Coin issue: 11.06.2026:

4549) “4 Seasons – Summer ("4 Seasons Serie)” 2026, Swiss Mint, Switzerland: 20-Franc Silver Special Coin: Date/Year of Coin issue: 11.06.2026:

On 11 June 2026, Swissmint has issued the new 20-franc special silver coin, “4 Seasons – Summer”. This special silver coin (fine silver 999) is the first in the new four-part series “The 4 Seasons”.

In Switzerland, the four seasons are clearly distinct from one another. They divide the year into four periods, defined by astronomical, calendar or climatic characteristics. These four seasons result from the tilt of the Earth’s axis (approximately 23.5°) and the Earth’s orbit around the Sun. This alters the intensity, duration and angle of incidence of sunlight at a given location.

In summer, the northern hemisphere is tilted most towards the sun and thus receives more light and heat during this season. 

The sun therefore features as the symbol of this season on the obverse of the coin. 

A world map centred on Switzerland is depicted in filigree at the heart of the radiant sun. 

At the bottom left is the constellation typical of summer, the “Summer Triangle”. Along the edge of the coin are the words “Estate” (summer in Italian), as well as “giugno, luglio, agosto”, the Italian names for the months of June, July and August.

The Coin:

The four seasons are depicted on the face values of the “4 Seasons” series using a stylised vegetation cycle. 

The section representing summer is raised and polished; the plant appears in full bloom. 

Around the edge of the coin is the face value of CHF 20, the inscription “CONFOEDERATIO HELVETICA”, the minting year 2026 and the mint mark "B" (for the Bern Mint -Swissmint).

The coin will be released in a limited issue comprising 8,000 coins in uncirculated quality in the blister and 3,500 coins in proof quality in presentation case. The proof silver coins are coloured in the shade typical of the season. 

The specifications of the coin are:   

Legal face value: CHF 20 

Metal Composition/Alloy: Silver 999 (Ag)

Diameter/Size: 33.00 mm 

Weight: 20 g

Mintage: Uncirculated: 8’000 units

Proof in presentation case: 3’500 units 

Online sales start: 11 June 2026, 08:00 a.m.

Some interesting post Links from Liechtenstein and Switzerland:

Posts from Liechtenstein:

1) 300 Years of Liechtenstein: Five Commemorative Coins issued in 04/2019, celebrating the milestone - 5 and 10 Franc Silver variants and 10, 25 and 100 Franc Gold variants: Coins issued by Coin Invest Trust

2) "Social Diversity": Liechtenstein - Switzerland: A Joint Stamp Issue of two stamps by Liechteinische Post and Swiss Post of CHF 1.00 and CHF 0.85: Stamp issue Date: 14.11.2019

3) Dragonflies II, Liechtenstein: A set of four stamps issued depicting White Featherleg (CHF 0.85), Red Veined Darter (CHF 1.30), Scarlet Darter (CHF 1.80) and Spotted Darter Dragonfly (CHF 2.00): Stamp Set issue date: 02.03.2020 

_{^{4) Ancient Postal Routes - the Mounted Messenger and the Stage Coach", Liechtenstein: EUROPA 2020 Theme: Liechtensteinsche Post has issued two stamps of the value of CHF 1.50 each on the theme of Ancient Postal Routes: Date of Stamp set issue: 02.03.2020}}

_{^{5) "PET Recycling", Liechtenstein: An embroidered Stamp of 6.30 Euros made from recycled polyester thread from 3,100 PET bottles: Date of Stamp issue: 07.09.2020}}

_{^{6) Panorama - Trails", Principality of Liechtenstein: A set of se-tenant stamps issued by Liechtensteinische Post (Liechtenstein Post) featuring popular trails in the country's Mountainous Landscapes: Date of stamp Set issue: 07.06.2021}}

7) "The White Woman" & "The Talibudel", Liechtenstein: EUROPA - 2022: "Stories and Myths theme: Liechtensteinische Post (Liechtenstein Post) has issued two Postage Stamps in the denominations of CHF 1.80 each depicting the Legends/Myths: Date of Stamp set issue: 07.03.2022

8) "Chimney Sweeper - Good Luck", Liechtenstein: Liechtensteinische Post (Liechtenstein Post) has brought out a set of two stamps - "Horseshoe" (CHF 0.90) and "Cloverleaf" (CHF 1.10) to commemorate the tradition of Good Luck Charms: Date of Stamp set issue: 07.03.2022

9) "Water", Liechtenstein: SEPAC - 2022: "Local Beverages" Theme: Liechtensteinische Post (Liechtenstein Post) has issued a Postal Stamp of CHF 1.80 depicting a Glass of Water: Date of Stamp issue: 07.06.2022

10) "Equality", Liechtenstein: A "BlockChain Stamp Series: A Stamp 4.1 "Equality issued by Liechtensteinische Post (Philately Liechtenstein) with a face value of CHF 9.00): Date of Stamp issue: 09.09.2022

11) Special Olympics World Games, Berlin (17-25.06.2023), Liechtenstein: Leichtensteinische Post AG (Liechtenstein Post) has issued a postage stamp of 1.80 CHF depicting the Games being held in Berlin, Germany: Date of Stamp issue: 05.06.2023

12) "100 Years of Swiss Franc, Liechtenstein"": A 100 Franc (100 Franken) Silver Coin co-ordinated by Coin Invest Trust (CIT): Minted by B.H. Mayer's Kunstprageanstalt  (GmbH) at their facilities in Munich:  Date/Year of Coin issue: 2024.

13) Night Watchman's Horn, Liechtenstein: Liechteinische Post AG (Liechtenstein Post) has issued a postage stamp of 1.90 CHF on Cultural Heritage titled "Night Watchman's Horn": Date/Year of Stamp issue: 04.11.2024

14) "Common Design - 70th Anniversary of EUROPA STAMPS", Liechtenstein: Liechtensteinische Post AG has issued one EUROPA Postage Stamp of 1.90 CHF 2026: Date of Stamp issue: 02.03.2026

15) "Fasnacht" (Meaning "Carnival"), a tradition that is actively celebrateds in Liechtenstein: A Set of Four Postage Stamps issued by Liechtensteinische Post AG: Date/Year of Stamp Set issue: 02.03.2026

Links to posts related to the Federal Shooting Festival, Switzerland on this blog:

1) The Legend of William Tell depicted on a Gold 50 Francs Swiss Coin issued on 26.04.2018

‎2) Federal Shooting Festival, Switzerland celebrated with the release of Silver 50 Franc and Gold 500 Franc "Talers" or Medals that are valid during the duration of the Festival (issue year - 2019)‎

3) Federal Shooting Festival, Switzerland celebrated with the release of Silver 50 Franc and Gold 500 Franc "Talers" (or Medals) that are valid during the duration of the Festival: Issue Year: 2020

4) Swiss Federal Shooting Festival (05.06-05.07.2026) Shooting "Talers" (or Medals) that are valid during the duration of the Competition, Switzerland: 150 Swiss Franc (Gold) and 1,000 Swiss Franc (Silver) Talers will continue a Long Tradition since the 19th Century: Date of Convertible Talers issue: 03/2026

Links on posts on Lakes and Waterways on this Blog:

1) "Lakes and Waterways", Switzerland: A 20 Francs Silver Four Coin Series highlights landmark Lakes and Waterways in Switzerland of which two will be released in 2025, while one each will be released in 2026 and 2027: Date/Year of the first two Coins issue: 30.10.2025

2) 20-Franc Silver Special Coin "Lake Geneva" 2026, Switzerland: "Swiss Lakes Coin Series": Third Coin in the Series: Swissmint has issued a 20 Franc Silver special Coin featuring the Lake: Date/Year of Coin issue: 19.03.2026

Posts on Coins and Banknotes from Switzerland on this Blog:

Did You Know Series (113): "Dove of Peace", Switzerland: An imternational initiative of an embroidered Postage stamp issued by Swiss Post: Postal administrations from various European countries (including Swiss Post), the United Nations, the Universal Postal Union and Austrian embroidery producer Hammerle and Vogel are all involved in the project: Date of Stamp issue: 04.09.2025

Alpine Flora Alpine Coin Series:

1) Alpine Edelweiss: "Flora Alpina" Series: The first coin in the Series issued in January 2016

2) Alpine Gentian: "Flora Alpine" Series: The Second Coin in the Series issued in January 2017 

3) Alpine Carline Thistle: "Flora Alpine" Series: The Third and Final coin in the Series issued in January 2018 

4) A 10 Franc Banknote honouring Charles Edourd Jaenneret popularly known as Le Corbusier who designed the Modern Indian city of Chandigarh 

5) 10 Franc Banknote issued by the Swiss National Bank wins the prestigious IBNS Award 2017

6) St. Bernard "Barry" (1800-1812): A commemorative 50 Francs Gold Coin issued by the Swiss Federal Mint on 14.09.2017

7) The Legend of William Tell depicted on a Gold 50 Francs Swiss Coin issued on 26.04.2018

8) "La Suisse": Swiss Steamships Coin Series: A 20 Francs Silver Coin issued on 26.04.2018:

9) Swiss Army Knife - 100th Anniversary of Karl Elsener's passing away (inventor of the original Swiss Army knife): A Silver 20 Franc Coin from the Swiss Federal Mint, commemorates the globally popular Swiss Army Knife: Coin issue date: 10.09.2018

10) 200 Franc Banknote: issued by the Swiss National Bank, Switzerland on 22.08.2018: Fourth of the six Banknotes in the Ninth Banknote Series being released by the Bank in a phased manner

11) 50 Franc Banknote issued by the Swiss National Bank, Switzerland, winner of the prestigious 2016 "International Banknote Society Award (IBNS)

‎12) Federal Shooting Festival, Switzerland celebrated with the release of Silver 50 Franc and Gold 500 Franc "Talers" or Medals that are valid during the duration of the Festival (issue year - 2019)‎

‎13) 100 years of the Swiss National Circus - "Knie" celebrated with the issue os 20 Swiss francs coin from the Swiss Mint stable (2019): Issue date: 24.01.2019‎

14) The Gotthard Base Tunnel (GBT): A Silver 20 Swiss Francs Coin issued by the Swiss Mint at their facility in Bern in 2016, commemorating the opening of the largest railway and deepest traffic tunnel in the world

15) "Crocodile" Locomotives, Switzerland: Centenary Celebration: Swiss Mint issues a 50 Francs Commemorative Gold Coin: Coin release date: 09.05.2019

16) "The Art of Brewing Beer" Stamp, Swiss Post: A set of two Stamps depicting two varieties of Beer, popular in Switzerland, issued by Swiss Post: Date of issue: 05.09.2019

17) Roger Federer, Switzerland: A 20 Francs Silver Coin issued by the Federal Swiss Mint commemorating the achievements of the legendary Tennis Player: Coin issue date: 23.01.2020

18) Edelweiss (Mountain Star), Swiss Alps, Mongolia: minted under the series titled "Numismatic Sculptures": Commemorative Gold Coins of 1000 Togrog and Silver Coins of 500 Togrog issued by Coin Invest Trust (CIT) and minted by B.H. Mayer's Kunstprageanstalt, Munich for Mongolia ‎

19) Federal Shooting Festival, Switzerland celebrated with the release of Silver 50 Franc and Gold 500 Franc "Talers" (or Medals) that are valid during the duration of the Festival: Issue Year: 2020

20) 200 Franc Banknote issued by the Swiss National Bank, Switzerland on 12.09.2019: Sixth and last of the six Banknotes in the Ninth Banknote Series released by the Bank in a phased manner

21) International Year of Plant Health, Switzerland: A Postage Stamp of CHF 0.85 issued by Swiss Post depicting a Japanese beetle eating a healthy plant leaf: Date os stamp issue: 05.03.2020‎ ‎

22) "Social Diversity": Liechtenstein - Switzerland: A Joint Stamp Issue of two stamps by Liechteinische Post and Swiss Post of CHF 1.00 and CHF 0.85: Stamp issue Date: 14.11.2019

23) Orell Fussli (1519-2019), Switzerland: Celebrating the 500th Anniversary milestone of the Banknote and Security Paper printng major with the issue of a House Note

24) "Ancient Postal Routes, through Rheinhausen-Basel-Zurich", Switzerland: EUROPA theme for 2020: A set of two Postage stamps of 100 Swiss Francs each issued by Swiss Post: Date of Stamp set issue: 07.05.2020

25) Microscopic Art, Switzerland: A set of two stamps of the values of 0.85 and 1.00 Swiss franc issued by Swiss Post: Date of Stamp set issue: 07.05.2020

26) 150th Anniversary of the Swiss Fire Brigade Association, Switzerland: A 20 Swiss Franc Silver Coin issued by the Swiss Mint, commemorates the milestone: Date of Coin issue: 03.09.2020

27) "Ceneri Base Tunnel", New Alpine Tranversal (NEAT), Switzerland: A 20 Franc Silver Coin issued by the Swissmint: Date of Coin issue: 03.09.2020

28) "Susten Pass", Switzerland: A 20 Franc Silver Coin issued by the Swissmint: Date of Coin issue: 03.09.2020

29) "Basel Dove" (or the "Basler Dybli") Stamp, Switzerland: 175th Anniversary of the Basel Dove Postage Stamp celebrated on Stamp Day - 2020: Date of Stamp issue: 05.11.2020

30) The Zytglogge" Clock Tower, Berne, Switzerland: A 500 Frane Postage Stamp issued by Swiss Post featuring the iconic Clock Tower in Berne: Date of Stamp issue: 05.11.2020

31) The European Hare (Lepus europaeus): "Swiss Forest Animals Coin Series": A Bimetallic Coin issued by the Swissmint, Switzerland: Date of Coin issue: 23.01.2020

32) The Red Fox (Vulpes vulpes): "Swiss Forest Animals Coin Series": A Bimetallic Coin issued by the Swissmint, Switzerland: Date of Coin issue: 21.01.2021

33) "Endangered National Wildlife", Switzerland: EUROPA - 2021: Swiss Post has issued a set of two Stamps featuring critically Endangered Swiss Butterflies - The Woodland Brown ("Lopinga achine") and The Scarce Large Blue ("Phengaris leleius"): Date of Stamp set issue: 06.05.2021

34) "Illusion - The Bridge of Life", (a painting by Sandro Del-Prete), Switzerland: A 20 Franc Silver Coin minted by the Swissmint: Date/Year of Coin issue: 29.04.2021

35) "Menzi Muck", Switzerland: "Swiss Inventions Stamps Series": First stamp in the Series: Date of stamp issue: 02.09.2021

36) Swiss Trees, Switzerland (Helvetia): "Swiss Post has brought out a Stamp Set featuring four Swiss Trees - Larch, Oak, Sycamore & Swiss Stone Pine: Date of Stamp Set issue: 02.09.2021

37) A Coin Set minted by the Swiss Federal Mint includes a 10 Franc Coin depicting the Alpine Edelweiss (National Flower of Switzerland) from the "Alpina Flora" Series and seven other denominations - 5 Fr, 2 Fr, 1 Fr, 1/2 Fr, 20, 10 & 5 Centimes: Year of Coin Set issue: 2016

38) Matterhorn, Alphorn & Edelweiss, Switzerland: "Typically Swiss Stamp Series": La Poste suisse (Switzerland Post) has issued Stamps depicting these popular Swiss themes: Date of Stamp issue: 08.09.2022

39) "Timemachine", Switzerland: A CHF 25 Gold Coin issued by the Swissmint depicting the evolution of Watchmaking Industry in the country: Date of Coin issue: 19.09.2022

40) Hans-Peter Mani Matter (1936-1970), Switzerland ("Confederatio Helvetica"): "Swiss Special Coins Series": First 20 Francs Silver Coin in the Series features the popular Bernese-German Songwriter and Singer: Date of Coin issue: 24.11.2022

41) Swiss River Landscapes, Switzerland: Swiss Post has issued a set of seven postage Stamps featuring seven distinctive River Landscapes across the length and breath of the country: Date of Stamp set issue: 02.03.2023

42) "The Flower of Life", Switzerland: Swiss Post has issued a postage stamp of 110 Swiss Francs depicting the positive energy represented by the Flower of Life: Date of Stamp issue: 02.03.2023

Aerial Cableway Coin Series:

43) i) "Aerial Cableway Klein Matterhorn", Switzerland: "Swiss Aerial Cableways Coin Series": The first Coin in the Series: A 20 Francs (CHF 20) Silver Coin released by the Swiss Mint depicting the "Zermatt Project" that is scheduled to be completed later this year: Date/Year of Coin issie: 21.03.2023

43 ii) "Aerial Cableway Titlis", Switzerland: "Swiss Aerial Cableways Coin Series": The second Coin in the Series: A 20 Francs (CHF 20) Silver Coin released by the Swiss Mint depicting the "Feldmoos-Chli-Titlis Aerial Tramway project": Date/Year of Coin issue: 08.11.2023

44) Swiss Constitution - 175th Anniversary (1848-2023), Switzerland (CONFOEDERATIO HELVETICA - Swiss Federation): 50-Franc (Gold) and 20-Franc Silver Coins issued by the Swiss Mint to celebrate the milestone: Date/Year of Coins issue: 01.07.2023

45) Swiss Linguistic Diversity" (Varietad Linguistica"), Switzerland: A Gold Coin of CHF 25 has been issued by the Swiss Mint featuring the various languages prevalent in the country: Date/Year of Coin issue: 30.11.2023

46) "100 Years of Swiss Franc, Liechtenstien"": A 10 Franc (100 Franken) Silver Coin co-ordinated by Coin Invest Trust (CIT): MInted by B.H. Mayer's Kunstprageanstalt  (GmbH) at their facilities in Munich:  Date/Year of Coin issue: 2024.

47) The 25 Franc Gold Coin from 2024 marks an important momemt in Swissmint's history: Dste/Year of Coin issue: 01.11.2024

48) Paddington (Bear), Switzerland: Swiss Post has issued a set of stamps featuring the popular fictional bear: Date/Year of Stamp issue: 07.11.2024

49) Globine, (Globi's friend), Switzerland: Swiss Post has issued a set of two postage stamps of 1.00 CHF and 1.20 CHF featuring Globine's Love of Nature: Date/Year of Stamp issue: 07.11.2024

50) Giants of the Ice Age, Switzerland: Mammoths in Switzerland: A set of two Stamps of 100 CHF and 120 CHF issued by Swiss Post: Date/Year of Stamps issue: 07.11.2024

51) Did You Know Series (96): Switzerland comes alive with a destive pre-Christmas spirit as "Samichlaus" (St. Nicholas) processions light up streets across the country: A 20 Franc Silver Coin issued by the Swissmint: Date/Year of Coin issue: 06.12.2024

52) Avante-Garde Swiss Artist Jean Tinguely, Switzerland: 20 Franc Proof (P) and Brilliant Uncirculated (BU) Silver Commemorative Coins Feature the popular artist: Date/Year of Coins issue: 22.05.2025

53) "Lakes and Waterways", Switzerland: A 20 Francs Silver Four Coin Series highlights landmark Lakes and Waterways in Switzerland of which two will be released in 2025, while one each will be released in 2026 and 2027: Date/Year of the first two Coins issue: 30.10.2025

54) Did You Know Series (124): 2,300 year old Celtic Gold Coins found in Barenfels bog near the municipality of Arisdorf, Switzerland

55) Symbols representing Diversity and Unity, Switzerland: A 20 Swiss Franc Silver Coin in Proof and Uncirculated Qualities issued by thev Swiss Mint: Date/Year of Coin issue: 12.09.2024

56) Swiss Federal Shooting Festival (05.06-05.07.2026) Shooting "Talers" (or Medals) that are valid during the duration of the Competition, Switzerland: 150 Swiss Franc (Gold) and 1,000 Swiss Franc (Silver) Talers will continue a Long Tradition since the 19th Century: Date of Convertible Talers issue: 03/2026

57) Hedgehog - "Animal of the Year", Switzerland: The swissmint at its Berne Mint has issued a 10 CHF (Cupro-nickel and Aluminum-Bronze) Coin fdepicting the Hedgehog: Date/Year of Coin issue : 19.03.2026

58) "Common Design - 70 Years of EUROPA Stamps", Switzerland: Swiss Post has issued two stamps (2 x 1.20 CHF): Date of issue: 07.05.2026

59) "4 Seasons - Summer (4- Seasons Serie)" 2026, Swiss Mint, Switzerland: 20-Franc Silver Special Coin: Date/Year of Coin issie: 11.06.2026

Pioneers in Swiss Aviation:

1) "Pioneers in Swiss Aviation", Switzerland: A 20-Franc Silver Coin issued by the Federal Mint Swissmint: Date of Coin issue: 18.09.2025

Swiss Glaciers Coin Series:

1) "Morteratsch Glacier", Switzerland: Swiss Glaciers Coin Series": First Coin in a three-coin Series being issued by the Swissmint: A 10 Francs Bimetallic Coin depicts the Glacier: Date/Year of Coin issue: 13.01.2022

2) "Rosenauer Glacier", Switzerland: Swiss Glaciers Coin Series": Second Coin in a three Coin Series being issued by the Swissmint: A 10 Francs Bimetallic Coin depicts the Glacier: Date/Year of Coin issue: 31.01.2023

3) "Rhone Glacier", Switzerland: "Swiss Glaciers Coin Series": The Third and Final Coin in the Series: A 10 Francs (CHF 10) Cupro-nickel, Aluminum-Bronze Coin released by the Swiss Mint depicting the Glacier: Date/Year of Coin issue: 11.01.2024

Energy of the Future Coin Series:

1) "Hydropower", Switzerland: A Three Coin Series kickstarted by the SwissMint titled - "Energy of the Future": The first 20 Franc Silver Coin in the Series is a Proof and Coloured Coin featuring Water Energy: Date of Coin issue: 09.09.2021

2) "Solar Energy", Switzerland: A Three Coin Series kickstarted by the SwissMint in 2021 titled - "Energy of the Future": The second 20 Swiss Franc Silver Coin in the series is a Proof and Coloured Coin featuring Solar Energy: Date of Coin issue: 21.07.2022

3) "Wind Energy", Switzerland: A Three Coin Series kickstarted by the SwissMint in 2021 titled - "Energy of the Future": The third 20 Swiss Franc Silver Coin in the Series is a Proof Coin featuring Wind Energy: Date/Year of Coin issue: 21.09.2023