Constintine I AV Solidus, Trier, struck 312-313 AD. 4.46 g. 

CONSTAN–TINVS P F AVG, laureate head right.
S P Q R OPTIMO PRINCIPI, legionary eagle between two 
standards, one surmounted by a hand, the other by a wreath.

Mintmark PTR. 

RIC VI 815; Cohen 556; Alföldi 507; Depeyrot 17/9; Sear 15715.

With permission of Numismatica Ars Classica, August 2012.
 Auction 54. Sold for 11,000 Swiss Francs.