Sol was the favorite and most frequently depicted God of the Roman pantheon in Probus' coinage. There are numerous variants of reverses with Sol; however the depiction of Sol in quadriga (left or central/spread) remains undoubtedly an iconic, classis reverse for Probus . This reverse type was struck in Lugdunum, Rome, Ticinum, Siscia, Serdica and Kyzikos mints, with each mint having its unique style. This paticular variant with bigh quadriga wheels is very rare.
Obverse: IMP C M AVR PROBVS P F AVG
Radiate bust left in imperial mantle, holding eagle-tipped sceptre (scipio).
Reverse: SOLI INVICTO / A / XXI
Sol in spread quadriga, holding whip, globe and raising hand.
Bilon, diameter 20,2 mm, weight 3,83 g.