Explanation
Post Mauryan period were either produced from moulds which were struck from dies. Including these, a new element of inscription was added to most of the coins to denote the issuing authority.
The earlier coins used symbols similar to those used on the punch marked coins but later those symbols were replaced by new devices of animals. The coins of Ujjain were of large variety and most of them had a single symbol which was popularly known as "Ujjain symbol".
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