minting technology

Ashoka sculpture on 1972-83 50 paise coins and 1962-82 1 rupee coins from Quarterrupee 841 days old

As noted earlier, a common design element on a number of coin types of different sizes may be exact reproductions of a single original design. This is ...

The pantograph from Quarterrupee 846 days old

In an earlier entry, I noted: Any coin design is composed of a number of design elements. During the process of producing a coin die, each design element ...

Different versions of the Ashoka column on 1972-90 25 paise coins from Quarterrupee 861 days old

Any coin design is composed of a number of design elements. During the process of producing a coin die, each design element is engraved on individual ...

The mints of the Republic of India from Quarterrupee 861 days old

During the six decades of Indian independence, four mints have been operating in India: Kolkata (Calcutta), Mumbai (Bombay), Hyderabad and Noida. The ...