Roman Silver Ring with Alexander the Great

2nd century AD. A profile portrait of Alexander with banded hair and curled extension above the ear, set in a silver finger ring. 30.8 grams, 31.15mm overall, 21.10x18.55mm internal diameter (approximate size British R, USA 8 1/2, Europe 18 3/4, Japan 18) (1 1/4"). Property of a London collector; acquired on the London market, 1990s-2000s.
Condition Report: Fine condition. A large wearable size.