On some of these coins, the Eastern mints replaced the Christogram with a dot, which might be an indication of the fierce debate surrounding Arianism. (for a bit more see-- RIC X, pg. xli)
Theodosius I
A.D. 388-392
12mm 1.06gm
DN THEODOSIVS PF AVG pearl-diademed, draped and cuirassed
SALVS REI-PVBLICAE Victory advancing l., with r. hand carrying trophy on shoulder and dragging captive with left.
In ex. ALEB, in left field dot
RIC IX Alexandria 20b
Officina B is not listed in RIC for Theodosius I, but is for Arcadius.