Constantine II, 321-324 AD, AE 12.5 Nummi.

Obverse: DN FL CL CONSTANTINVS NOB C, Laureate draped bust right. 

Reverse: IOVI CONSERVATORI , Jupiter standing left.
leaning on sceptre, and holding Victory. Eagle and Captive
at his feet. X/II(gama) in field to right 

SMKA in exergue= Cyzicus mint 1st officina 

RIC #19 , Rated R3 

20mm , 3.2 grams

Contributed by Jerome Holderman, www.rustyromans.com