Nero and Agrippina II AV Aureus. Struck 54 AD, Lyons mint. 

AGRIPP AVG DIVI CLAVD NERONIS CAES MATER, Nero, bare head right, 
facing draped bust of Agrippina left.
NERONI CLAVD DIVI F CAES AVG GERM IMP TR P around EX S C within oak 
wreath. 

RIC 1; Sear5 2041.

With permission of Numismatica Ars Classica, sold for 22,000 SFr.