Marks on Ancient Coinage

Greek coins are named relative to their weight, with the drachm the standard coin. Different regions used different weights however, as follows:⁷

Standard Coin That Was the Stater Location Used

Attic Didrachm of 8.6g, but later Tetradrachm of 17.2g Some cities of Sicily, northern part of Aegean Islands, Macedonian Kingdom since Alexander the Great

Corinth Tridrachm of 8.6g Northwest Greece, colonies in Italy and Sicily

Aigina Didrachm of 12.6g Cities of Peloponnese, central Greece, Cyclades islands, Crete, southern Asia Minor

Euboea Tridrachm of 16.8g Euboean colonies in northern Aegean islands and Sicily

Standard	Coin That Was the Stater	Location Used
Attic	Didrachm of 8.6g, but later Tetradrachm of 17.2g	Some cities of Sicily, northern part of Aegean Islands, Macedonian Kingdom since Alexander the Great
Corinth	Tridrachm of 8.6g	Northwest Greece, colonies in Italy and Sicily
Aigina	Didrachm of 12.6g	Cities of Peloponnese, central Greece, Cyclades islands, Crete, southern Asia Minor
Euboea	Tridrachm of 16.8g	Euboean colonies in northern Aegean islands and Sicily

Based on the weights above, the various denominations are:

Denomination Relationship Weight

Attic Corinth Aigina Euboea

Dekadrachm 10 drachms 43.00g 29.00g 63.00g 56.00g

Tetradrachm 4 drachms 17.20g 11.60g 25.20g 22.40g

Tridrachm 3 drachms 12.90g 8.60g 18.90g 16.80g

Didrachm 2 drachms 8.60g 5.80g 12.60g 11.20g

Drachm 6 obols 4.30g 2.90g 6.30g 5.60g

Tetrobol 4 obols 2.85g 1.93g 4.20g 3.73g

Triobol 3 obols 2.15g 1.45g 3.15g 2.80g

Diobol 2 obols 1.43g 0.97g 2.10g 1.87g

Trihemiobol 1 1/2 obols 1.07g 0.72g 1.57g 1.40g

Obol 1/6 drachm 0.72g 0.48g 1.05g 0.93g

Tritartemorion 3/4 obol 0.54g 0.36g 0.79g 0.70g

Hemiobol 1/2 obol 0.36g 0.24g 0.52g 0.47g

Trihemitartemorion 3/8 obol 0.27g 0.18g 0.39g 0.35g

Tetartemorion 1/4 obol 0.18g 0.12g 0.26g 0.23g

Hemitartemorion 1/8 obol 0.09g 0.06g 0.13g 0.12g