Mariniana, wife of Valerian, AV Aureus AD 256, 3.35 g. 

DIVAE MARINIANAE Diademed, draped and veiled bust right. 
CONSECRATIO Peacock in splendour facing, head left. 

Cohen 1; RIC 1; Göbl 212a; Calicó 3455 (this coin); 
Göbl MIR 212a; Biaggi 1449 (this coin).
Of the highest rarity, only very few specimens known. 
From the Biaggi collection. 

With permission of Numismatica Ars Classica - Auction 54, March 2010.