Watch List notes:

Caracalla (198-217), As, Rome, AD 210-213
AE (g 12,72; mm 25; h 6)
ANTONINVS - PIVS AVG BRIT, laureate head r., Rv. PROVIDENTIAE - DEORVM, Providentia standing l., holding sceptre and wand over globe; in field, S - C. RIC 519; C 533.
Dark green patina, somewhat gently smoothed, anyway extremely fine.