I am having great difficulty attributing, or even identifying this one, I assume its Marcus Aurelius. I searched RPC for any Marcus Aurelius with λH in the reverse legend, but couldn't quite get close. λH supports Lydia, but I can't read enough of the rest of the Greek on the reverse to tell. Reverse motif appears to be a half-nude god, seated left, holding *something* (lightning bolt?). Position of the hand and the object sort of something other than a lightning bolt, as it doesn't make sense to balance the bolt on its end like that. The curious part is that he wears a solar crown, which should narrow things down somewhat. 19mm, 5.7g
You might try Amphipolis It looks like some that I used to own. The reverse is actually a seated Tyche. (Fortuna) As I recall they were generally in the 20-25 mm range THIS is NO LONGER MY COIN
I guess the first point of attack is to figure out the deity - who is often seen seatead on a pile of rocks or omphalos, and wears a solar crown?
Probably Septimius Severus, Caesarea in Cappadocia, rev. radiate god seated l. on Mt. Argaeus and holding branch, rev. legend begins MHTPO, date ET Γ (year 3) in exergue, Sydenham 420, citing his own collection.
Oh wow, that's brilliant, @curtislclay . You are the real MVP. My guesses of "pile of rocks" and "omphalos" were both very far off. I love how versatile Mt Argaeus is - I've seen it on an altar, by itself, and now surmounted by a god. Cool!