This coin is part of an unpublished, very rare and brief first phase of Serdica's 3rd issue with greek letters and without the KA mark in exergue (Pink only cites latin letters which apparently were used in the second phase of this 3rd issue according to Philippe Gysen).
Very rare and desirable consular bust type to right (instead to left as usual).
Unpublished unicum of the highest numismatic interest!
Ex. M. Griffiths collection
Obverse: IMP C M AVR PROBVS P F AVG
Reverse: SOLI INVICTO = Sol in spread quadriga, holding whip
BUST TYPE: H4 = radiate bust right in consular robe, holding eagle-tipped sceptre (scipio)
FIELD / EXERGUE MARKS: -/-//Gamma
WEIGHT 4.17g / AXIS: 12h / DIAMETER: 23mm
