I just got a small group of silvered campgates, all from Eastern mints. There were some nice examples of
the use of Δ- E for workshop 9, instead of Θ, which some people at the time considered the symbol of death (http://www.lateromanbronzecoinforum.com/index.php/topic,660.msg1931.html#msg1931)
The draped and cuirassed bust is rarer of the two.
Constantine I
A.D. 327- 328
19mm 3.6gm
CONSTAN-TINVS AVG; head with rosette diadem.
PROVIDEN-TIAE AVGG; camp gate, two turrets, no doors, star above; across fields Δ- E.
In ex. SMANT
RIC VII Antioch 78
Constantine I
A.D. 327- 328
18x19mm 3.7gm
CONSTANTI-NVS MAX AVG; rosette diademed, draped and cuirassed bust.
PROVIDEN-TIAE AVGG; camp gate, two turrets, no doors, star above; across fields Δ- E.
In ex. SMANT
RIC VII Antioch 84