Watch List notes:

Greek PB Sling Bullet. Circa 4th-1st century BC. Wasp / Blank. For similar, cf. Paunov & Dimitrov, 'New data on the use of war sling in Thrace' in Archaeologia Bulgarica 3, 2000, pg. 50, fig. b; cf. Roma E-Live 3, 1112. 46.84g, 32mm x 15mm.

Condition as seen. A heavy example

From a private UK collection.