Cos, silver, tetradrachms (Heracles/crab) (280-250 BCE)
From SILVER
280 BCE - 250 BCE Silver 4,995 kg
Description
| Obverse: | Head of Heracles right, wearing Nemean lion skin headdress. |
| Reverse: | ΚΩΙΟΝ (Greek).Crab. In the field, magistrate name and bowcase. All within incuse square with square of dots. |
Mint and issuing power
| Mint: | Cos | Ancient region: | Caria (islands) | Modern country: Greece | Authority: |
Chronology
| From | 280 BCE | to | 250 BCE | Period: Hellenistic 323-30 BC 
|
Physical description
| Metal: | Silver
|
Median weight in grams | 15.20 | Denomination: | tetradrachm
|
Standard: |
Image
References
| Die study reference: | "[[Die study reference" contains a listed "[" character as part of the property label and has therefore been classified as invalid.]]1Ingvaldsen 2002, p. 278-286 (series XIV) | ||
| Coin series reference: | |||
| Coin series web reference: | |||
Obverse dies distribution
| Frequency ᵖ | Number of obverses ᵖ (o) | % (o) | Number of coins (n) | % (n) | Die name |
| 1 | 4 | 25 | 4 | 2.82 | 3, 4, 7, 9 |
| 3 | 1 | 6.25 | 3 | 2.11 | 6 |
| 5 | 2 | 12.5 | 10 | 7.04 | 10, 11 |
| 6 | 1 | 6.25 | 6 | 4.23 | 2 |
| 7 | 1 | 6.25 | 7 | 4.93 | 8 |
| 8 | 1 | 6.25 | 8 | 5.63 | 12 |
| 12 | 2 | 12.5 | 24 | 16.9 | 5, 16 |
| 14 | 1 | 6.25 | 14 | 9.86 | 13 |
| 17 | 1 | 6.25 | 17 | 11.97 | 15 |
| 20 | 1 | 6.25 | 20 | 14.08 | 14 |
| 29 | 1 | 6.25 | 29 | 20.42 | 1 |
| Total | 16 of 16 | 100 | 142 of 142 | 99.99 |
Reverse dies distribution
no distribution is available
Quantification
| Number of obverses ᵖ (o) | 16 | Number of singletons (o1) ᵖ | 4 |
| Number of reverse dies (r) | 58 | Number of coins (n) | 142 |
| Coins per obverse die (n/o) | 8.88 | Coins per reverse die (n/r) | 2.45 |
| Reverse per obverse ratio (r/o) | 3.63 | Percentage of singletons (o1) ᵖ | 25 % |
| Original number of dies (O) (Carter 1983 formula) ᵖ | 16.43 | Coins struck if 20,000 as average productivity per die ᵖ | 328,600 |
| Original number of dies (O) (Esty 2011 formula) ᵖ (O) | 18.03 | Survival rate if 20,000 as average productivity per die ᵖ | 0.00043 |
| Coverage (o = % of O) (Esty 1984 formula) ᵖ (o = % of O) | 97.18% | Die productivity if survival rate 1/2,000 ᵖ | 17,285.45 |
| Weight of silver (in kg) if 20,000 coins per die (O = Carter formula) ᵖ | 4,995 kg <br /> 4,995 kg | Die productivity if survival rate 1/5,000 ᵖ | 43,213.63 |
Remarks
References
- ^ Ingvaldsen, Håkon (2002), Cos. Coinage and Society. The chronology and function of a city-state coinage in the Classical and Hellenistic period, c. 390 - c. 170 BC, unpublished doctoral dissertation, Oslo University.
