Silver tanka of Shams al-Din Muzzafar II (1511-1525), Gujarat Sultanate, India (G#242)

Al-Mu'ayyad bi-ta'yid al-rahman shams al-dunya wa'd bin abu'l nasr (reading upward) // Muzaffar Shah al-Sultan khallada allah mulkahu within a peaked square, date is written out in the upper left margin (off-flan). 18mm, 6.7 grams. "The coins of the Indian Sultanates" G242.

Struck at the 64 rati standard. The date in the margin on this type always seem to be 918 AH (1512), but it nearly always off-flan. There are additional legends in the scalloped margin, probably naming the mint, but they are unread. Coins with a visible date are very rare. 

The Gujarat Sultanate was a medieval Indian Muslim Rajput kingdom established in the early 15th century in present-day Gujarat, India. The founder of the ruling Muzaffarid dynasty, Zafar Khan (later Muzaffar Shah I) was appointed as governor of Gujarat by Nasir-ud-Din Muhammad bin Tughluq IV in 1391, the ruler of the principal state in north India at the time, the Delhi Sultanate. Following Timur's invasion of Delhi, the Delhi Sultanate weakened considerably so he declared himself independent in 1407 and formally established Gujarat Sultanate. The end of the sultanate came in 1573, when Akbar annexed Gujarat in his empire.