Tiberius II Constantine, 578-582. Tremissis (Gold, 17 mm, 1.42 g, 5 h), Constantinopolis. o N IVSTINVS P P AVI Diademed, beardless and draped bust of Justin II to right. Rev. VICTOR TibЄRI AЧS / CONOB Cross potent. Cf. DOC 13. MIB 11a and SB 353 (for obverse) and DOC 7, MIB 9b and SB 425 (for reverse). Spink NCirc (1990) 6718 = Stacks, The Golden Horn Collection (2009), 3106. Of the highest rarity, apparently the second known example. Very fine.
From a Swiss collection of ancient, medieval and modern gold coins, ex Auctiones GmbH E-Auction 62, 16 December 2018, 127.
This extremely rare hybrid issue combines an obverse die of Justin II with a reverse die of Tiberius II Constantine.