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Constantine I, AE3, 330-333, Thessalonica

CONSTANTI-NVS MAX AVG
Rosette-diademed, draped, cuirassed bust right
GLOR-IA EXERC-ITVS
Two soldiers standing facing, helmeted heads turned toward 
each other, reversed spear in outer hand, inner hand resting 
on shield, two standards with medallion on banner between 
them
Mintmark SMTSB

RIC VII, 183 (C3)