Cos, silver, didrachms (Heracles/crab) (280-250 BCE)
From SILVER
280 BCE - 250 BCE Silver 1,530 kg
Description
| Obverse: | Head of Heracles right, wearing Nemean lion skin headdress. |
| Reverse: | ΚΩΙΟΝ (Greek).Crab. Beneath, club. In the field, magistrate name. 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 | 6.70 | Denomination: | didrachm
|
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. 248-252 (series XI) | ||
| Coin series reference: | |||
| Coin series web reference: | |||
Obverse dies distribution
Reverse dies distribution
no distribution is available
Quantification
| Number of obverses ᵖ (o) | 11 | Number of singletons (o1) ᵖ | 2 |
| Number of reverse dies (r) | 23 | Number of coins (n) | 88 |
| Coins per obverse die (n/o) | 8 | Coins per reverse die (n/r) | 3.83 |
| Reverse per obverse ratio (r/o) | 2.09 | Percentage of singletons (o1) ᵖ | 18.18 % |
| Original number of dies (O) (Carter 1983 formula) ᵖ | 11.42 | Coins struck if 20,000 as average productivity per die ᵖ | 228,400 |
| Original number of dies (O) (Esty 2011 formula) ᵖ (O) | 12.57 | Survival rate if 20,000 as average productivity per die ᵖ | 0.00039 |
| Coverage (o = % of O) (Esty 1984 formula) ᵖ (o = % of O) | 97.73% | Die productivity if survival rate 1/2,000 ᵖ | 15,411.56 |
| Weight of silver (in kg) if 20,000 coins per die (O = Carter formula) ᵖ | 1,530 kg <br /> 1,530 kg | Die productivity if survival rate 1/5,000 ᵖ | 38,528.9 |
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 The chronology and function of a city-state coinage in the Classical and Hellenistic period, c. 390 - c. 170 BC, unpublished doctoral dissertation, Oslo University.
