Nomos AG, 49
LESBOS, Unattributed early mint. Circa 500-450 BC. BI Stater (19mm, 11.19 g). Confronted cows’ heads; olive tree between / Small incuse square punch. SNG Copenhagen 285; SNG von Aulock 1682; BMC p. 154, 46. Near EF, toned. Struck from fresh dies of fine style, on a flan of excellent metal.
The obverse has the wonderful optical illusion of either two confronted cows’ heads or a single cow’s head as seen from above.