Dimensions:
6 mm
0.07 g
Silver
The paper contains info provided by the seller. In case it is illegible, this is what it says:
C. 480-461 B.C.
AR (0.069g)
obv:
Herakles(?) hdR. - dotted circled (head facing right)
rev:
EM (retrograde) in dotted circle
Messene-Messane (Sicily)
Of Rosen 66 Reverse (half of Rosen 66)
Based on the information, it seems closest to N#393226, but the obverse of my coin doesn't resemble a rabbit.