Yep. Considered it briefly, Joe. But of course the throne, exergual line, and text in exergue - all present here and absent on the Cappadocia hemidrachms - peg this as an M. Cato quinarius. Furthermore, the word in exergue appears to possibly begin with "VIC" here, as with the Cato issue. A match for sure. Weight discrepancy, which isn't drastic (less than half a gram off from many of the Cato quinarii I see), is reasonable given the probability we're dealing with a degraded fouree.