77/1 #08139-42 Drill-brace (or crooked staff) and cornear Sicily Roma Dioscuri Denarius
Denarius. 214-210BC. 4.18grams. Sicily mint. Anonymous. Crawford 077/01 drill and cornear. Obverse: hd Roma r. Reverse: Dioscuri r, cornear, drill. Extremely Rare.
One of the rarest coins in the entire Roman republican era; the existence of the type was only verified in the 2nd half of the 20th century - whilst Sydenham listed the example from his own collection, only the existence of other dies showed that this was not a bizzare die error from an otherwise normal wheat-ear denarius, but an entirely new type. The squiggly line on the right is in fact a hand-drill - sometimes call a brace, one cranks it round as fast as possible using the kink in the centre. There is additional discussion about this coin on andrewmccabe.ancients.info/Auctions.html and related pages.