Watch List notes:

KINGS of BOSPORUS. Rhescuporis IV, with Gallienus. Circa AD 242/3-276/7. BI Stater (21mm, 7.54 g, 11h). Dated Bosporan Era 564 (AD 267/8). Diademed and draped bust of Rhescuporis right; trident to right / Laureate head of Gallienus right; K to right, ΔZΦ (date) below. MacDonald 623; Anokhin 2080. Fine.

From the collection of Dr. Lawrence A. Adams. Ex Classical Numismatic Auctions XII (26 September 1990), lot 570.