Watch List notes:

Taksashila and Pushkalavati, Gandhara Janapada. Anonymous. Shatamana (27.73 mm, 11.54 g). 600-300 B.C. 6-armed Gandharan symbols at each end of the bar / Blank. EF, Extremely Rare. 

This is one of the 16 Major Janapadas also called as Maha Janapadas. This is catalogued by Buddhists in Anaguttara Nikaya