(Got it as a forwarded)
Indian coins are mainly produced in 4 cities
1. Delhi
2. Mumbai
3. Hyderabad
4. Kolkata
The production in city puts an identification mark under the year of
issue. Coins produced in:
1. Delhi - have a dot
2. Mumbai - have a diamond
3. Hyderabad - have a star
4. Kolkata - Nothing beneath the year