Watch List notes:

ANCIENT COINS. Roman Coins. Mint of Rome unless otherwise stated. Gratian (A.D. 367-383), Gold Solidus, 4.44g, 6h.Mint of Constantinople.Struck A.D. 380.DN GRATIANVS P F AVG, bust of Gratian facing right, pearl-diademed, draped and cuirassed. Rev. CONCORDIA AVGGG, Constantinopolis seated facing, her head turned right, on a throne ornamented with lions' heads, holding a sceptre and a globe, her right foot resting on a prow, CONOB in exergue (RIC 44 var (rosette-diadem); C 5; Biaggi 2273 (this coin); Depeyrot 31/1).A slight bend in the flan, otherwise with residual lustre, extremely fine.
Ex M&M, Auction XVII, Basel, 2-4 December 1957, lot 627
Ex Biaggi collection
Ex Numismatica Ars Classica, Auction 34, Zürich, 24 November 2006, lot 101
Part of the Aurora Collection.

Estimate: US$ 1,600