Watch List notes:

Domitian, as Caesar, 69-81. Semis (Orichalcum, 17.5 mm, 2.84 g, 6 h), uncertain mint in Asia minor, possibly Ephesos, 77-78. CAESAR DOMITIANVS AVG F Laureate head of Domitian to right. Rev. COS V PRINC IVVENT / S-C Cornucopia to left, filled with fruits. RIC² 1521. RPC 1488. Extremely rare type; only three recorded in RPC online, and another four, including the present coin, in CA. About very fine.
From the Brett Telford Collection, USA, ex Naumann 57, 3 September 2017, 577.