The overall assessment:
I have received two sets of five stamps each from the e-post office located at Sansad Marg HO, New Delhi 3 each of which are placed below:
A set of three stamps of Rs.25/- each depicting the Rashtrapati Bhavan, New Delhi.
A set of three stamps of Rs.5/- each depicting the Istana, in Singapore.
The Singapore $2 stamp depicts "Rashtrapati Bhavan". Also mentioned on the stamp is "Singapore-India Joint Stamp Issue".
(The above Commemorative Banknotes set is from the collection of Jayant Biswas. Post researched and written and Banknotes scanned and uploaded by Rajeev Prasad)
1) Coins of Singapore