Agrigentum, silver, didrachms (eagle/crab) (450-440 BCE)
From SILVER
450 BCE - 440 BCE Silver 167 kg
Description
| Obverse: | AKRAC - ANTOS (partially retrograde) (Greek).Eagle standing l. on dotted line |
| Reverse: | Crab within shallow incuse circle |
Mint and issuing power
| Mint: | Agrigentum | Ancient region: | Sicily | Modern country: Italy | Authority: |
Chronology
| From | 450 BCE | to | 440 BCE | Period: Archaic until 480 BC 
|
Physical description
| Metal: | Silver
|
Median weight in grams | 8.50 | 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. 140-141, n° 441-443 | ||
| 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° 743 | ||
| Coin series web reference: | |||
Obverse dies distribution
| Frequency ᵖ | Number of obverses ᵖ (o) | % (o) | Number of coins (n) | % (n) | Die name |
| 19 | 1 | 100 | 19 | 100 | 1 |
| Total | 1 of 1 | 100 | 19 of 19 | 100 |
Reverse dies distribution
no distribution is available
Quantification
| Number of obverses ᵖ (o) | 1 | Number of singletons (o1) ᵖ | |
| Number of reverse dies (r) | 3 | Number of coins (n) | 19 |
| Coins per obverse die (n/o) | 19 | Coins per reverse die (n/r) | 6.33 |
| Reverse per obverse ratio (r/o) | 3 | Percentage of singletons (o1) ᵖ | % |
| Original number of dies (O) (Carter 1983 formula) ᵖ | 0.98 | Coins struck if 20,000 as average productivity per die ᵖ | 19,600 |
| Original number of dies (O) (Esty 2011 formula) ᵖ (O) | 1.06 | Survival rate if 20,000 as average productivity per die ᵖ | 0.00097 |
| Coverage (o = % of O) (Esty 1984 formula) ᵖ (o = % of O) | % | Die productivity if survival rate 1/2,000 ᵖ | 38,775.51 |
| Weight of silver (in kg) if 20,000 coins per die (O = Carter formula) ᵖ | 167 kg <br /> 167 kg | Die productivity if survival rate 1/5,000 ᵖ | 96,938.78 |
Remarks
