EL 35% 'quarter' of Carthage (Zeugitana), c. 255-241 BC

Obv. head of Tanit
Rev. horse standing r.

Jenkins-Lewis 447   2.43 g   Copenhagen 992
this coin

Standard used reduced version Phoenician tridrachm or 1.5-shekels (theoretically 11.40 g)
This quarter-piece is regard as 3/4 drachm.
The equivalent in silver must have been quite arbitrary.