Cos, silver, tetradrachms (bearded Heracles/crab & club) (355-335 BCE)
From SILVER
355 BCE - 335 BCE Silver 6,661 kg
Description
| Obverse: | Head of Heracles left or right, bearded, wearing Nemean lion skin headdress. |
| Reverse: | ΚΩΙΟΝ (Greek).Crab. Beneath, club. In the field, magistrate name (et symbol ou une lettre). All within (incuse) square with square of dots. |
Mint and issuing power
| Mint: | Cos | Ancient region: | Caria (islands) | Modern country: Greece | Authority: |
Chronology
| From | 355 BCE | to | 335 BCE | Period: Classical 480-323 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. 230-236 (series VI) | ||
| 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 | 6 | 30 | 6 | 5.56 | 1, 4, 5, 10, 15, 16 |
| 2 | 2 | 10 | 4 | 3.7 | 2, 11 |
| 3 | 4 | 20 | 12 | 11.11 | 3, 6, 7, 18 |
| 4 | 2 | 10 | 8 | 7.41 | 9, 12 |
| 5 | 1 | 5 | 5 | 4.63 | 19 |
| 8 | 2 | 10 | 16 | 14.81 | 8, 14 |
| 12 | 1 | 5 | 12 | 11.11 | 13 |
| 13 | 1 | 5 | 13 | 12.04 | 20 |
| 32 | 1 | 5 | 32 | 29.63 | 17 |
| Total | 20 of 20 | 100 | 108 of 108 | 100 |
Reverse dies distribution
no distribution is available
Quantification
| Number of obverses ᵖ (o) | 20 | Number of singletons (o1) ᵖ | 6 |
| Number of reverse dies (r) | 48 | Number of coins (n) | 108 |
| Coins per obverse die (n/o) | 5.4 | Coins per reverse die (n/r) | 2.25 |
| Reverse per obverse ratio (r/o) | 2.4 | Percentage of singletons (o1) ᵖ | 30 % |
| Original number of dies (O) (Carter 1983 formula) ᵖ | 21.91 | Coins struck if 20,000 as average productivity per die ᵖ | 438,200 |
| Original number of dies (O) (Esty 2011 formula) ᵖ (O) | 24.55 | Survival rate if 20,000 as average productivity per die ᵖ | 0.00025 |
| Coverage (o = % of O) (Esty 1984 formula) ᵖ (o = % of O) | 94.44% | Die productivity if survival rate 1/2,000 ᵖ | 9,858.51 |
| Weight of silver (in kg) if 20,000 coins per die (O = Carter formula) ᵖ | 6,661 kg <br /> 6,661 kg | Die productivity if survival rate 1/5,000 ᵖ | 24,646.28 |
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.
