Watch List notes:

2nd century B.C. Æ 1/2 karshapana (19 mm, 6.18 g). Four punches: tree-in-railing, indradhvaja, 4-orbed Ujjain symbol, and symbol / Ujjain symbol with a srivatsa in two opposite orbs. Cf. Pieper 483 (without Ujjain symbol on rev.). Rare. Green patina. Choice very fine. 

Eran coins usually have a blank reverse. This has a Ujjain symbol on reverse, which is not listed in Pieper.