This coin is not in RIC with this bust. Another example-
http://www.notinric.lechstepniewski.info/7lon-260.htmlConstantine II
A.D. 322-323
19mm 2.1gm
CONSTANTI-NVS IVN NC; bust left, radiated, wearing trabea and raising right hand.
BEAT TRA-NQLITAS; globe on altar inscribed VOT / IS / XX, three stars above; F/B across fields.
In ex. PLON
RIC VII London –