Missed this one a couple weeks back. The reverse is ambiguous and so it might be a hard one to pin down. But just to offer a thought of what I am reminded of. The reverse cupping and the overall fabric remind me of the issues from Termessos, Pisidia featuring Zeus and forepart of a horse left. The weight is about right. The reverse - if indeed showing the forepart of a horse - would have had to have been struck well off-center on the OP coin - and the "horse" seems proportionally just a bit small - which doesn't support the attribution. Also, the style of the obverse bust seems off, although the out-of-focus picture doesn't help. My initial impression of that portrait was that it looks modern (it reminds me of fakes I've seen) - but, then again, the fabric does seem good. And why would a faker create an ambiguous reverse? Anyway, there's my stream of consciousness. It's a tough nut.