THESSALY, Koinon of Thessaly. Marcus Aurelius. AD 161-180. Æ Assarion (20mm, 7.71 g, 11h). AYT M AYP ANT ωNЄINOC, laureate, draped, and cuirassed bust right / KOINON ΘЄCCAΛωN, Athena Itonia striding right, hurling spear held in her right hand, shield on her left arm. BCD Thessaly II 963 (this coin); Burrer, MA-G 3 var. (bust type); Rogers 96 var. (same). Green patina. Near VF. Apparently unique, only this coin appearing in CoinArchives.
Ex BCD Collection (Triton XV, 3 January 2012), lot 963 (hammer $1100).
This piece, with a different bust type than typical for this issue, also exhibits an unusual style and the dies appear to have been smaller than usual for the assaria. Perhaps these dies were intended to be used on an even smaller denomination, but were instead employed for striking assaria?