Bronze AE3, 20mm, 3.80gm, issued AD 324/325. Londinium mint.
Obv: CONSTANTINVS IVN NOB C, Laureate, draped and cuirassed bust facing right.
Rev: PROVIDENTIAE CAESS (PLON in ex.), Camp gate with two turrets. Star above.
This coin series was one of the last issued from the London mint, which was closed the following year.