Old Coin ID Help..bronze Stamped | Egypt Hadrian Hemiobol

The portrait appears to be bearded - so I'd guess Hadrian or Antoninus Pius as the emperor.

Given the unusual "truncated cone" shape of the planchet, I'd guess it's an Egyptian bronze coin, such as an obol, rather than the base-silver tetradrachms you normally see; if you can tell us the diameter, that will give us a better idea of the denomination.

I'm having a hard time figuring out who is supposed to be depicted on the reverse, but given the thing balanced on top of his head, I'd guess Serapis or a similar Egyptian deity.

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Hang on while I go and dig out my American dimes, to find out how big one is...

OK, about 17mm. That would be a hemiobol; the smaller dichalkon didn't normally have an obverse legend, which this one does; I would read that legend as "AVT [kai] TRAIA ADRIA SEB" in Greek letters - emperor Hadrian.

I think I've figured out who's on the reverse, too: Demeter, holding a long torch and some ears of grain. That would make this coin the one listed in the catalogue Sear# 3821; the illegible date would be "L-IA" (Year 11), equating to 126-127 AD. Here is a similar one (though in worse condition) discussed on the FORVM forum.