Gordian III & Tranquillina, AE28 of Anchialus, Thrace.

AVT K M ANT GORDIANOC AVG TRAKVLLINA - Confronted busts
OVLPANEN AGXIALEWN - Hygeia standing right feeding snake in her arms 
Mint: (241-244 AD) 
Wt./Size/Axis: 12.4g / 28mm / -  
References: AMNG II, 666; Moushmov 2964 
>>Varbanov 712 (this coin illustrated).
Used with permission of CNG coins, www.cngcoins.com, Apr, 2007