Optical Illusion -- Lesbos, c. 500 - 450 B.C.

A most unusual use of illusion on a coin. The two confronting boars' heads can also be viewed as the facing head of a panther.

Billon 1/10th stater, SGCV II 3488, Rosen 542, VF, Lesbos mint, weight 0.994g, maximum diameter 9.5mm, c. 500 - 450 B.C.; obverse confronting boar heads, creating the illusion of a facing head of a panther; reverse incuse square punch.