INDIAN MINT MARKS

CALCUTTA

No Mint Marks calcuttasmall
BOMBAY or MUMBAI
Diamond below date Bombay Diamond sml 
'B' Below date Bombay Bsml 
'M' After 1996 BombayMsml 
HYDERABAD
SPLIT Diamond hyderabadSplitdiamondsml
Dot in Diamond Hyderabaddotindiamondsml
Star(*) Mark Below Date Hyderabadstarsml
NOIDA
Big Round 'Dot' below date Noidadotsml
FOREIGN MINTS
INDIAN COINS MINTED IN FOREIGN MINTS
TAEGU KOREA
Star(*) below 1st digit of the date Teague koreasml 
SEOUL KOREA
Star(*) below the last digit of the date Seoul Koreasml
ROYAL MINT OTTOWA CANADA
'C' Below date Ottowa Canadasml
ROYAL MINT LONDON UK
Diamond below the 1st digit London UKsml
BIRMINGHAM UK
'H' below the last digit of the date Birmingham Uksml
SOUTH AFRICA - PRETORIA MINT
Letter 'M' in oval below date Pretoriasml
TOWER MINT - UK
'U' below the date Tower mint Uk
MEXICO CITY MINT
Letter 'O' above & 'M' below date Mexicosml
SLOVAKIA KREMNCA MINT
Letter 'MK' in circle Slovakia Kremncasml
RUSSIA MOSCOW MINT
MMD in oval below the date Russiasml