Caracalla. AV Quinarius, 3.34g. Struck 215-217 AD. 

ANTONINVS PIVS AVG GERM, laureate head right. 
CO–S IIII P P, Lion, radiate, advancing left, holding thunderbolt in its jaws. 

C –. BMC –. RIC –. King –. An apparently unrecorded reverse
 of an extremely rare denomination. Struck on a very large 
flan, good very fine / about extremely fine. For an aureus 
with the same titolature and similar reverse type cf. C 366, 
BMC p. 462 note 178, RIC 283a and Calicó 2754. 

With permission of Numismatica Ars Classica NAC AG, Auction 54, lot 499. Sold for 20,000 CHF.