Agrigentum, silver, didrachms (eagle/crab) (510-495 BCE)
From SILVER
510 BCE - 495 BCE Silver 6,429 kg
Description
| Obverse: | AKRA (Greek).Sea eagle standing left. |
| Reverse: | Crab within shallow incuse circle |
Mint and issuing power
| Mint: | Agrigentum | Ancient region: | Sicily | Modern country: Italy | Authority: |
Chronology
| From | 510 BCE | to | 495 BCE | Period: Archaic until 480 BC 
|
Physical description
| Metal: | Silver
|
Median weight in grams | 8.70 | Denomination: | didrachm
|
Standard: |
Image
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References
| Die study reference: | "[[Die study reference" contains a listed "[" character as part of the property label and has therefore been classified as invalid.]]1Westermark 2018, p. 9-30, n° 1-89 | ||
| Coin series reference: | "[[Coin series reference" contains a listed "[" character as part of the property label and has therefore been classified as invalid.]]2Sear I, n° 708, "[[Coin series reference" contains a listed "[" character as part of the property label and has therefore been classified as invalid.]]3HGC 2, n° 87 | ||
| Coin series web reference: | |||
Obverse dies distribution
| Frequency ᵖ | Number of obverses ᵖ (o) | % (o) | Number of coins (n) | % (n) | Die name |
| 3 | 1 | 2.7 | 3 | 0.65 | 2 |
| 6 | 1 | 2.7 | 6 | 1.3 | 24 |
| 10 | 1 | 2.7 | 10 | 2.16 | 25 |
| 15 | 1 | 2.7 | 15 | 3.25 | 28 |
| 17 | 1 | 2.7 | 17 | 3.68 | 12 |
| 18 | 1 | 2.7 | 18 | 3.9 | 37 |
| 20 | 1 | 2.7 | 20 | 4.33 | 3 |
| 21 | 1 | 2.7 | 21 | 4.55 | 17 |
| 27 | 1 | 2.7 | 27 | 5.84 | 20 |
| 28 | 1 | 2.7 | 28 | 6.06 | 21 |
| 30 | 1 | 2.7 | 30 | 6.49 | 7 |
| 31 | 1 | 2.7 | 31 | 6.71 | 10 |
| 2 | 3 | 8.11 | 6 | 1.3 | 1, 5, 34 |
| 4 | 2 | 5.41 | 8 | 1.73 | 4, 31 |
| 5 | 2 | 5.41 | 10 | 2.16 | 13, 30 |
| 7 | 2 | 5.41 | 14 | 3.03 | 16, 35 |
| 8 | 2 | 5.41 | 16 | 3.46 | 14, 33 |
| 9 | 3 | 8.11 | 27 | 5.84 | 22, 23, 26 |
| 11 | 3 | 8.11 | 33 | 7.14 | 9, 11, 32 |
| 12 | 2 | 5.41 | 24 | 5.19 | 8, 15 |
| 14 | 2 | 5.41 | 28 | 6.06 | 9, 36 |
| 16 | 2 | 5.41 | 32 | 6.93 | 27, 29 |
| 19 | 2 | 5.41 | 38 | 8.23 | 6, 18 |
| Total | 37 of 37 | 100.01 | 462 of 462 | 99.99 |
Reverse dies distribution
no distribution is available
Quantification
| Number of obverses ᵖ (o) | 37 | Number of singletons (o1) ᵖ | |
| Number of reverse dies (r) | 53 | Number of coins (n) | 462 |
| Coins per obverse die (n/o) | 12.49 | Coins per reverse die (n/r) | 8.72 |
| Reverse per obverse ratio (r/o) | 1.43 | Percentage of singletons (o1) ᵖ | % |
| Original number of dies (O) (Carter 1983 formula) ᵖ | 36.95 | Coins struck if 20,000 as average productivity per die ᵖ | 739,000 |
| Original number of dies (O) (Esty 2011 formula) ᵖ (O) | 40.22 | Survival rate if 20,000 as average productivity per die ᵖ | 0.00063 |
| Coverage (o = % of O) (Esty 1984 formula) ᵖ (o = % of O) | % | Die productivity if survival rate 1/2,000 ᵖ | 25,006.77 |
| Weight of silver (in kg) if 20,000 coins per die (O = Carter formula) ᵖ | 6,429 kg <br /> 6,429 kg | Die productivity if survival rate 1/5,000 ᵖ | 62,516.91 |
Remarks
Most likely two workstations Likely military
References
- ^ Westermark, Ulla (2018), The coinage of Akragas c. 510-406 BC, 2 vol., Uppsala.
- ^ Sear, David R. (1978), Greek coins and their values. Vol. I, Europe, London, xl, 316 p.
- ^ Hoover, Oliver D. (2012), The Handbook of Greek Coinage Series. 2. Handbook of the Coins of Sicily (Including Lipara). Civic, Royal, Siculo-Punic, and Romano-Sicilian Issues. Sixth to First Centuries BC, Lancaster-London, 489 p.
