Late Roman Bronze Coins

Behind the ear, at the base of the hairline, note the straight line; which must have been an engraving aid.


Crispus
A.D. 324-325
19mm     3.1gm
FL IVL CRISPVS NOB CAES; Laureate, draped and cuirassed bust left.
PROVIDEN-TIAE CAESS; camp gate with two turrets and star between them.
in ex. SMNB
RIC VII Nicomedia 91

Neat. It seems the line on his left shoulder is also rather straight.  Maybe another aid?

it does seem unusually straight