Watch List notes:

Gratian (367-383), Solidus, Constantinopolis, AD 378-383; AV (g 4,51; mm 20; h 12); D N GRATIA - NVS P F AVG, diademed, draped and cuirassed bust r., Rv. CONCOR - DIA AVGG A, Constantinopolis seated facing on throne ornated with lions' heads, holding sceptre and globe; foot on prow. RIC 45a; C 5.
Extremely fine. [From an old collection, bought from ancient auctions].