Constantine II as Caesar AE 3. London. AD 323-324.

CONSTANTI-NVS IVN NC, Laureate, draped bust left, holding 
Victory on globe and mappa.
BEAT TRA-NQLITAS, globe on altar inscribed VOT-IS-XX, three
stars above.
Mintmark PLON.

RIC VII London 288.
Rated R1. 

With permission of cngcoins.com, Dec. 2012.