Pontos, Amisos. 2nd-1st century BC. AE 19mm - Very Rare with "A" Symbol

Pontos, Amisos, late 2nd - early 1st century BC (time of Mithradates VI).  AE 19mm (7.85g).  Head of young Ares right, wearing crested helmet, A behind / Sword in sheath, ΑΜΙ−ΣΟΥ across field; monograms in lower left and upper right fields.  

Sear 3643 var. (no A behind Ares). 

VF, bit of flat strike on reverse.  Nice, big coin and very rare with "A" symbol.  Based on the strike, wear and rarity of this type, this is likely the earliest issue and the later types dropped the A on the obverse.