Watch List notes:

Egypt, Alexandria. Antoninus Pius. A.D. 138-161. BI tetradrachm (23.1 mm, 13.83 g, 12 h). Dated RY 2 = A.D. 138/9. AVT K T AIΛ AΔP ANTωNINOC ЄV CЄB, bare-headed, draped and cuirassed bust of Antoninus Pius right / ЄTOVC B, draped bust of Serapis right, wearing kalathos and laurel wreath. RPC IV.4, 13407 (temporary) ; Milne 1586; SNG France 2122; Emmett 1426. aVF. Rare variety.

Rare variety with this bust type, only four specimens known to RPC.