Your 1941 (George VI) is #531. It is Calcutta as the mint mark (the dot for Mumbai) would appear below the date between the second and third number.
The dots at the side of the words 'ONE', 'ANNA', 'INDIA' and date started with #530. The difference between #530 and #531 is that the #530 has an extra dot above the letter 'N' at 12 o'clock.
The 1/4 Annas issued before 1938 did not have the dots beside the letterings.
The dots at the side of the words 'ONE', 'ANNA', 'INDIA' and date started with #530. The difference between #530 and #531 is that the #530 has an extra dot above the letter 'N' at 12 o'clock.
The 1/4 Annas issued before 1938 did not have the dots beside the letterings.























