Watch List notes:

M. Atilius Saranus, 148 BC. Denarius (Silver, 20 mm, 3.54 g, 3 h), Rome. SAR(AN) Helmeted head of Roma to right; X below chin. Rev. M · ATE / ROMA The Dioscuri on horseback riding right. each holding couched lance in right hand. Babelon (Atilia) 8. Crawford 214/1c. Sydenham 308d. Attractively toned. Surface metal chipping along edges, otherwise, very fine.
From the collection of W. M. Stoecklin, Winterthur, Switzerland, acquired prior to 1981.