I just got this neat example and it still has some silvering remaining.
Constantine I
Circa A.D. 323
18mm 2.6g
CONSTAN-TINVS AG; laureate bust right, wearing trabea (?), holding eagle-tipped sceptre in right hand.
BEAT TRAN-QVILLITAS; globe set on altar inscribed VOT/IS/XX; above, three stars.
in ex. PTR
Trier copy