Coin sold at 02/04/2005
GBP 8.51
USD 16.00
EUR 12.40

Constantine II AD 316-340 AE3, 3.32g. 
Obv: CONSTANTINVS IVN NOB C - Laureate, cuirassed bust right. 
Rev: PROVIDEN-TIAE CAESS, Campgate, 6 layers, two turrets, star above, Gamma in left field, CONS star in ex.

Constantinople mint
RIC VII, 39, rated R3