Constantine II (337-340AD)
AE3- 3,11 gram, 20 mm, London mint, struck 322-323 AD as Caesar
obv: CONSTANTINVS IVC N C, radiate, draped and cuirassed bust left, seen from behind
rev: BEAT TRANQVILLITAS, altar inscribed VOT/IS/XX, surmounted by globe,three stars above, PLON in exergue, F in left field, B in right field
RIC VII, 255