Constantine I, AE follis, London, 321 AD.

CONSTANT-INVS AVG, radiate, mantled bust left, 
holding eagle tipped sceptre.
BEATA TRA-NQVILLITAS, Globe on altar inscribed VOT-IS-XX
P-A across fields.
Mintmark PLON.

RIC VII London 207
Extremely rare (R5).

With permission of ArtCoins Roma, Auction 6, Dec. 2012.