The Diobol denomination
An ancient Greek silver coin denomination with a value of 2 obols or 1/3 drachm, typically weighing about 1.41 - 1.43 grams.
Diobol

(1) Alexander III 336-323 AD
Obverse: Alexander III
Reverse: Zeus seated Left
Ref: None provided
(2) Antandros c. 425-400 BC
Obverse: female head right (Artemis Astyrene?)
Reverse: lion head right within incuse square; ANTAN
Ref: Cf. SNG von Aulock 7582 (later type...
(3) Apollonia Pontica 400-300 BC
Obverse: laureate head of Apollo facing
Reverse: anchor upside down; crayfish right; A
Ref: Topalov Apollonia p. 386, 4; SNG BM...
(4) Claudius 41-42 AD
Obverse: laureate head right, star right; TI KΛAY KAI__CEBAC ΓEPM
Reverse: bull butting right; AYTOKPA / L B
Ref: RPC I 5122; Milne 69; Geissen 73; D...
(5) Eastern Celts | Demetrius I 150-50? BC
AR Diobol Unknown mint
Obverse: diademed head right
Reverse: cornucopiae IMBA?
Ref: None provided
(6) Lampsakos 400-200 BC
Obverse: Janiform female head
Reverse: helmeted head of Athena right, bee to the right; ΛA_M
Ref: SNG France 1190
(7) Mesembria 450-350 BC
Obverse: crested Corinthian helmet facing
Reverse: wheel; M E Ϡ A
Ref: BMC 3; Sear #1673; SNGBMC 268ff, Mo...
(8) Mesembria 400-350 BC
Obverse: Crested helmet facing
Reverse: META in quartiles of radiate wheel.
Ref: SG# 1673
(9) Miletos 6th-5th Century BC
Obverse: Forepart of a lion left, head right
Reverse: Stellate design within square incuse
Ref: SNG Kayhan 462-75
(10) Miletos 6th-5th century BC
Obverse: Forepart of lion left, head to right
Reverse: Stellate pattern within incuse square
Ref: SNG Kayhan 462-75
(11) Mithrapata 390-370 BC
Obverse: Facing scalp of lion
Reverse: Triskeles within incuse square
Ref: Müseler VII.91-2, SNG Copenhagen Su...
(12) Mytilene 400-350 BC
Obverse: Laureate head of Apollo right
Reverse: MYTI. Head of Aphrodite or Sappho right; uncertain symbol to left; all within incuse circle
Ref: Cf. BMC 8-14; HGC 6, 1037.
(13) Pantikapaion c. 450-438/7 BC
Obverse: lion head facing
Reverse: incuse square, swastika pattern with stellate designs in two opposite quarters
Ref: Frolova, frühe, Type VIII; Anokhin ...
(14) Ptolemy II 275-265/264 BC
Obverse: laureate head of Zeus-Ammon right
Reverse: eagle with spread wings standing on lightning, Galatian shield left, ΠΤΟΛEMAIOY ΒΑΣΙΛΕΩΣ, (ΣΩ) // (XAP), Λ between eagle's legs
Ref: Svornos 581
(15) Teos 375-350 BC
Obverse: Griffin seated right, left forepaw raised
Reverse: Lyre
Ref: None provided
(16) Vekhssere I 440-430 BC
Obverse: Helmeted head of Athena right.
Reverse: Laureate head of Apollo right; diskeles to right; all within incuse square
Ref: Müseler V.11; Vismara, Wekhssere, 6...
(17) Vespasian 72-73 AD
Obverse: laureate head right; AYTOK KAIΣ ΣEBA OYEΣΠAΣIANOY
Reverse: Falcon standing right; L E
Ref: Geißen: 295, Dattari: 415