Constantine I, AE follis, London, 20-22mm, 3.3 g. AD 316.

CONSTANTINVS P AVG, laureate, cuirassed bust right (with Mr Spock ears).
SOLI INVIC-TO COMITI, Sol, wearing chamys across left shoulder, holding 
globe and raising right hand.

S-P across fields.
Mintmark MLN.

RIC VII London 56; Sear 16054.
Rated R2.

Contributed by Glenn Simonelli, Oct. 2016.
Glenn wrote that this is a Special Star Trek commemorative issue, 
featuring Constantine I wearing "Mr. Spock" ears on obverse. I 
don't know whether to believe him or not :-)