Watch List notes:

INDIAN COINS, SULTANATES, Sultans of Dehli, Muhammad bin Tughluq, Gold Tanka, Dehli, AH 74x, in the name of the caliph al-Mustakfi, 11.05g (G&G D427). About very fine
This type is known dated from AH 741 to 744, the last digit is rather strangely engraved and is uncertain

Estimate: £300-350