From the Gemini IV Auction, Closed January 8, 2008. Lot # 478 - 
Gordian III. AR antoninianus with overstruck reverse, 5.01 g. Antioch, AD 239. 

IMP CAES M ANT GORDIANVS AVG, radiate, draped and cuirassed bust right, seen from behind.
P M TR P II COS P P, Providentia standing left, holding globe and transverse sceptre. 
RIC 172/RSC 196 overstruck on RIC 177/RSC 17; Bland 44/21 (this coin). 

Ex Triton V, 2002, George His Collection, lot 2068. Ex Sternberg XIX, 18–19 November 1987, lot 744. 

With permission of Freeman & Sear and Harlan J Berk.