This coin is not listed in RIC for the radiate bust. It should come after Trier 387. It's not in Alten & Zschucke for the dotPTRdot series either, though they have examples for dotPTR crescent (#176- 177). Several people were interested in it as it sold for $176.77.
Constantine II
A.D. 322- 323
3.5gm
CONSTANTINVS IVN NOB C; radiate, draped and cuirassed bust left, raising right hand, holding globe in left.
BEATA TRANQVILLITAS; globe set on altar inscribed VO/TIS/XX; above, three stars.
In ex. dot STR dot
RIC VII Trier --