How did issuing coins in the name of the Caliph help Muhammad - Bin - Tughluqto rule ?

Muhammad bin Tughluq noticed foreign empires using coins. Muhammad decided to use the same policy himself. He memorialized himself and his activities through his coinage and produced more gold coins than had his predecessors. The coins boasted fine calligraphy. He issued a number of fractional denominations. These coins were called "tanka".His introduction of token currency, coins of baser metal with the face value of silver coins, however, failed dismally.

The large influx of gold from his south Indian campaign led him to increase coinage weights. He enlarged the gold dinar from 172 grains to 202 grains. He introduced a silver coin, the adlis, which was discontinued after seven years due to lack of popularity and acceptance among his subjects.

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