CIMRM Supplement - Tauroctony. Cincinnati, USA
Vermaseren describes this item so:1
See also photo and description in Janson,2 and representation at Bridgeman Art which states: "Mithras slaying the bull, c.150-200 (limestone), Roman, (2nd century AD) / Cincinnati Art Museum, Ohio, USA / Gift of Mr. and Mrs. Fletcher E. Nyce / The Bridgeman Art Library. 62.2x95.2x17.8 cms"