Constantine, AE22, Cyzicus, 311-312 AD.

Obv: IMP C FL VAL CONSTANTINVS P F AVG, laureate head right.
Rev: SOLE IN-VICTO, Sol standing left in long robe, right hand raised, left hand holding head of Serapis.

Gamma in left field.
Mintmark MKV.

Unlisted for Constantine with this mintmark and officina letter.
RIC VI Cyzicus 92 var (Maximinus. Unlisted for Constantine).

One in Brent Upchurch's collection, another (this coin) in
Glenn Simonelli's collection. 
Contributed by Glenn Simonelli, April 2011.