The Trihemiobol denomination
An ancient Greek denomination with a value of 1 1/2 obols or 1/4 drachm. The name means 'three half obols'.

It weighed around 1.07 grammes.
Trihemiobol

(1) Siris c. 500-480 BC
Obverse: Satyr crouching right, without tail; •
Reverse: rough incuse square
Ref: HPM p. 81, 12, pl. VII, 13 var. (no...
(2) Thasos c. 411-350 BC
Obverse: Satyr holding kantharos, kneeling left; grasshopper left
Reverse: amphora; ΘAΣ_IΩN
Ref: Vgl. Lanz: Auktion 82 (24.11.1997) ...