Constantine, AV 2 Aurei Multiple, 10.63g, Rome, 307 AD.

CONSTANTINVS NOB CAESAR, radiate head right.
PRINCIPI IVVENTVT, Constantine, laureate and in military dress, 
standing left, holding sceptre and raising right hand, 
standard to left.
Mintmark PR.

RIC VI 142; Carson 98.

Extremely rare, second example known.
Estimate:65,000

With permission of Leu Numismatik AG, Auction 93, lot 131.
Sold for 62,000 SFr.