Brockage of C. Fonteius, 114-113 BCE, AR denarius. Rome, 3.87g, 20mm.
Obv: Janiform head of the Dioscuri; V to left, denomination mark to right
Rev: Brockage of obverse. (Usual reverse: Galley with pilot and three oarsmen left.)
Crawford 290/1; Sydenham 555
From the JB (Edmonton) collection, acquired from Arcade Coins in 2012.

Very attractive example of a brockage.