Question

from which year the stamps in india were issued in decimal currency ?

Answer 1

In 21 November 1947 the first stamp in India were issued in decimal currency....

I hope it is correct....

Answer 2

The first stamp of the independent nation, India was issues on 21 November 1947 with  the national flag and the slogans of the patriots on it.

It was the time when India had their first decimal currency stamp 1957 with different other themes such as technology and developement and other images.