The Didrachm denomination
An ancient Greek silver coin denomination with a value of 2 drachms or 1/2 tetradrachm.

It weighed around 8.6 grammes, and could feature some impressive artwork due to the relatively large flans.
Didrachm
(1) Akragas
/Files/Images/Coinsite/CoinDB/Akragas(0).jpg
An AR Didrachm struck 480-470 BC in Akragas
Obverse: sea eagle; AK / AЯ

Reverse: crab

Diameter: -
Die Orientation: -
Weight: 8.6 g
ex Dr. Ernst von Ferrari-Kellerhof
Jenkins, Gela, Group IV; SNG ANS 954-5.
(2) Akragas
/Files/Images/Coinsite/CoinDB/coin-the-raven-collection-zYCAJM-stitched-basic_light-large_(2).jpg
An AR Didrachm struck 510-472 BC in Akragas
Obverse: Crab

Reverse: Eagle, with closed wings, standing right; AK behind, RA before

Diameter: 19 mm
Die Orientation: -
Weight: 8.4 g
No notes for this coin
Sear 709 A
/Files/Images/Coinsite/CoinDB/Hyria.jpg
An AR Didrachm struck c. 405-400 BC in Hyria (Campania)
Obverse: head of Hera Lakinia facing slightly right, wearing necklace and polos ornamented with palmette between the foreparts of two griffins

Reverse: man-faced bull walking right YPINA (retrograde)

Diameter: 0 mm
Die Orientation: 0 H
Weight: 7 g

From the H.J. Müller collection.

Rutter 134; Historia Numorum Italy 540
(4) Korkyra
/Files/Images/Coinsite/CoinDB/1319_Korkyra.jpg
An AR Didrachm struck c. 229-48 BC in Korkyra
Obverse: Head of Dionysos right wearing ivy-wreath

Reverse: Pegasos; below prow right (KP) (AV) (KP)

Diameter: -
Die Orientation: -
Weight: 4.8 g
No notes for this coin
HGC 6, 65
/Files/Images/Coinsite/CoinDB/Demeter.png
An AR Didrachm struck 400-340 BCE in Metapontion
Obverse: Head of Demeter right, hair bound with wreath of barley ears

Reverse: META (Barley ear)

Diameter: 19.6 mm
Die Orientation: 6 H
Weight: 8.05 g
At the bottom of Demeter's neck, one can just make out the top of an A and an Ρ for 'ΑΡΙ', or Aristoxenos, the die-cutter. Provenance: Hess-Leu, Lucerne, March 27th 1956, lot 22. Peus, Frankfurt, auction 274, October 29th 1970, lot 1511. Privately purchased from ArtAncient.
No references provided for this coin
(6) Rhodos
/Files/Images/Coinsite/CoinDB/Rhodos(0).jpg
An AR Didrachm struck c. 316-304 BC in Rhodos
Obverse: Helios head facing slightly right

Reverse: rose, grape cluster left, bud to the right; POΔION / E

Diameter: -
Die Orientation: -
Weight: 6.8 g
No notes for this coin
Ashton, Colossus Series 1b. SNG Keckman 445
(7) Segesta
/Files/Images/Coinsite/CoinDB/Segesta(0).jpg
An AR Didrachm struck c. 460-440 BC in Segesta
Obverse: Hound standing left

Reverse: Head of the nymph Segesta right, swastika behind

Diameter: -
Die Orientation: -
Weight: 8.2 g
ex Roma Numismatics
SNG ANS 621 (Without Swastika); McClean 2543 (Without Swastika)
(8) Tyre
/Files/Images/Coinsite/CoinDB/Tyre_didrachm(0).jpg
An AR Didrachm struck c. 330-329 BC in Tyre
Obverse: Bearded Melqart riding hippocamp with curled wing to right, waves and dolphin below

Reverse: Owl standing right, head facing; crook and flail behind date II (year 2) and Phoenician letter tsade in right fields

Diameter: -
Die Orientation: -
Weight: 8.5 g
ex Forum Ancient Coins
BMC Phoenicia p. 231, 29; SNG Cop 307 var.(year)