The following is from Oesho:
Adain pointed out, with the above subject, the rarity of the 1939 issue. I
have attached an image of the 1939 rupee of George VI, Bombay mint from my
collection, which could be added to that page.
Rupees of the British Indian series are often found with countermarks
attributed to localities in the Middle East and East Africa. Those are
mostly applied on coins of Queen Victoria and earlier issues. On British
Indian coins of the post Victoria era countermarks are very seldom found.
Attached you find two countermarked rupees of George VI.
A) Rupee George VI, 1941 Bombay mint, c/m A.G.A.H./1943 (Provisional
Government Azad Hind / 1943). Azad Hind (Free India) was a movement founded
by Subhas Chandra Bose. The c/m was first published in the Numismatic Digest
vol. V - part I (1981). More recent an example of it is published in the
book Indian Tokens: Popular Religious & Secular Art from Ancient period to
the present day, by Michael Mitchiner (London 1998)
B) Rupee George VI, 1942 Bombay mint, c/m RAM in Hindi. RAM probably refers
to Rama, the hero from the Ramayana. Rama represents an ideal man, as
conceived by the Hindu mind. In the story of Ramayana, Rama's personality
depicts him as the perfect son, devoted brother, true husband, trusted
friend, ideal king, and a noble adversary. One can only guess why this
countermark has been applied on the effigy of George VI or would he also
posses the same virtues as RAM.