S 671 - Alexandria, silver, didrachm, 165-154 BC
From SILVER
165 BCE - 154 BCE Silver 822 kg
Description
| Obverse: | Head of Ptolemy I Soter to right, wearing diadem and aegis around neck. |
| Reverse: | ΠΤΟΛΕΜΑΙΟΥ ΣΟΤΗΡΟΣ (Greek).Eagle standing to left on thunderbolt. |
Mint and issuing power
Chronology
| From | 165 BCE | to | 154 BCE | Period: Hellenistic 323-30 BC 
|
Physical description
| Metal: | Silver
|
Median weight in grams | 7.05 | Denomination: | didrachm
|
Standard: | Ptolemaic |
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.]]1Olivier 2012, p. 198-199, no. 4355-4374. | ||
| Coin series reference: | |||
Obverse dies distribution
| Frequency ᵖ | Number of obverses ᵖ (o) | % (o) | Number of coins (n) | % (n) | Die name |
| 3 | 1 | 20 | 3 | 15 | D192 |
| 4 | 1 | 20 | 4 | 20 | D191 |
| 9 | 1 | 20 | 9 | 45 | |
| 1 | 2 | 40 | 2 | 10 | D193, D194 |
| Total | 5 of 5 | 100 | 18 of 20 | 90 |
Reverse dies distribution
no distribution is available
Quantification
| Number of obverses ᵖ (o) | 5 | Number of singletons (o1) ᵖ | 2 |
| Number of reverse dies (r) | 0 | Number of coins (n) | 20 |
| Coins per obverse die (n/o) | 4 | Coins per reverse die (n/r) | |
| Reverse per obverse ratio (r/o) | 0 | Percentage of singletons (o1) ᵖ | 40 % |
| Original number of dies (O) (Carter 1983 formula) ᵖ | 5.83 | Coins struck if 20,000 as average productivity per die ᵖ | 116,600 |
| Original number of dies (O) (Esty 2011 formula) ᵖ (O) | 6.67 | Survival rate if 20,000 as average productivity per die ᵖ | 0.00017 |
| Coverage (o = % of O) (Esty 1984 formula) ᵖ (o = % of O) | 90% | Die productivity if survival rate 1/2,000 ᵖ | 6,861.06 |
| Weight of silver (in kg) if 20,000 coins per die (O = Carter formula) ᵖ | 822 kg <br /> 822 kg | Die productivity if survival rate 1/5,000 ᵖ | 17,152.66 |
Remarks
References
- ^ Olivier, Julien (2012), Archè et Chrèmata en Egypte au IIe siècle avant J.-C. (204-81 av. J.-C.). Etude de numismatique et d'histoire, [Unpublished doctoral dissertation], Orléans University, 2012.
