Watch List notes:

(x) Megaris, Megara (c. 350-275 BC), Æ Dichalkon, 13mm., 1.72g, 7h, prow left, upon which is set a tripod, rev. two dolphins swimming clockwise (Kroll 643; BCD Peloponnesos 9.5; HGC 4), dark brown patina, almost very fine.
Provenance
From the Nomos Brasiliana Collection (NB021)
BCD Collection, CNG Inventory no. 836018 - $135
Purchased Baldwin, January 1972
Estimate: £40 - £60