M. Volteius M.f.. Silver denarius 3.92 g. Rome, 75 BC. 

Obv: Laureate head of Apollo right
Rev: Tripod, snake coiled around front leg and rearing head above; S.C on left, D.T on right
M.VOLTEI M.F. in exergue. 

Crawford 385/5. Sydenham 778 (R8). RSC Volteia 5. 

Extremely rare. 

With permission of Numismatica Ars Classica - Auction 70, Lot 138, May 2013.