In 1974, both India and the USSR issued commemorative postage stamps to celebrate the 100th birth anniversary of the Russian artist and humanitarian Nicholas Roerich

India Issue Details
The Indian commemorative stamp was officially released on October 9, 1974.
Design: The stamp features a medallion of Nicholas Roerich created by H. Droopsy.
Denomination: According to indianphilatelics.com, the stamp has a value of 1 Rupee (1r).
Form: It was issued as a single commemorative stamp and is also available in mint sheets of 35 stamps or mint blocks of four.