Watch List notes:

Antoninus Pius. AD 138-161. Æ Sestertius (31.5mm, 23.78 g, 6h). Rome mint. Struck AD 139. ANTONINVS AVG PIVS P P, laureate head right / A S [I A] around, COS II/ S C in two lines across field, Asia, towered and draped, standing left, holding crown on extended right hand and anchor on ground in left. RIC III 579; Strack 779δ; Banti 38 var. (placement of rev. legend); BMCRE 1183; G. Hirsch 188, lot 704 (same dies). Green-brown patina, areas of minor porosity and smoothing, scratch on reverse. VF. Rare.

From the William H. Whetstone Collection. Ex Collection of a Gentleman, Kent, England (Classical Numismatic Group 117, 19 May 2021), lot 540 (hammer $1,900).