Watch List notes:

Macedonian Kingdom. Alexander III the Great. 336-323 B.C. AE 17 half-unit (17.17 mm, 4.42 g, 10 h). Uncertain Macedonian mint, struck 323-310 B.C. (Amphipolis?). Macedonian shield; race torch on boss / Β Α / Σ Ι, Crested Macedonian helmet with cheek guards; in bottom field, trident head right to left of caduceus right, both above monogram . Price 0420. VF, glossy, light green patina. Scarce. 

The race-torch - traditional badge of Amphipolis - seems not to be one of the more commonly seen devices on the shield-boss