Constantine II, AE follis. London. 322-323 AD.

CONSTANTI-NVS IVN NC, radiate, cuirassed bust right.
BEAT TRA-NQLITAS, altar inscribed VOT - IS - XX, three stars
above. 
F-B across fields.
Mintmark PLON

RIC VII London 256.
Rare, rated R3

With permission of Pegasi Numismatics Auction 140, lot 439. August 2011.