Agrigentum, silver, didrachms (488/485-480/478 BCE)

Die Studies Database

SILVER IDUnique ID of the page ^ᵖ: 10361

488 BCE - 478 BCE Silver 2,979 kg

Description

ObverseInscription or printing placed on the obverse.:	ΑΚRΑ (Greek).Eagle standing left with closed wings.
ReverseInscription or printing placed on the reverse.:	Crab within a circular incuse

Mint and issuing power

MintIdentifies the place of manufacture or issue of a numismatic object.:

Agrigentum

Ancient regionAncient region.:

Sicily

Modern countryModern country: Italy

AuthorityIdentifies the issuing power. The authority can be "pretended" when the name or the portrait of X is on the coin but he/she was not the issuing power. It can also be "uncertain" when there is no mention of X on the coin but he/she was the issuing power according to the historical sources:

Chronology

FromIdentifies the initial date in a range assigned in a numismatic context.

488 BCE

toIdentifies the final date in a range assigned in a numismatic context..

478 BCE

PeriodTime period of the numismatic object.: Archaic until 480 BC

Physical description

MetalThe physical material (usually metal) from which an object is made.:

Silver

Median weightMedian of the weights of numismatic objects (in grams). in grams

8.70

DenominationTerm indicating the value of a numismatic object. Examples: tetradrachm, chalkous, denarius.:

didrachm

StandardStandard.:

Image

S 1492 - Agrigentum, silver, didrachms (488-485-480-478 BCE).jpg [1]

References

Die study referencePublication of the study:	Westermark 20181Westermark 2018, p. 46-76, n° 154-237 (Period I, Group III)
Coin series referenceReference to coin series study:	HGC 22HGC 2, n° 94

Obverse dies distribution

FrequencyFrequency of specimen in distribution. ᵖ	Number of obversesNumber of obverse dies. ᵖ (o)	% (o)	Number of coinsNumber of coins. (n)	% (n)	Die nameName(s) of the die(s).
5	1	5.56	5	0.57	66
8	1	5.56	8	0.91	81
12	2	11.11	24	2.74	65;80
20	1	5.56	20	2.29	82
24	1	5.56	24	2.74	79
33	1	5.56	33	3.77	78
40	1	5.56	40	4.57	74
45	2	11.11	90	10.29	67;72
55	1	5.56	55	6.29	68
61	1	5.56	61	6.97	77
71	1	5.56	71	8.11	75
72	1	5.56	72	8.23	70
79	1	5.56	79	9.03	69
83	1	5.56	83	9.49	76
94	1	5.56	94	10.74	73
116	1	5.56	116	13.26	71
Total	18 of 18	100.06	875 of 875	100

Reverse dies distribution

no distribution is available

Quantification

Number of obversesNumber of obverse dies. ᵖ (o)	18	Number of singletons (o1)The number of singleton coins. ᵖ
Number of reverse diesNumber of reverse dies. (r)	59	Number of coinsNumber of coins. (n)
Coins per obverse dieNumber of coins per obverse die. (n/o)		Coins per reverse dieNumber of coins per reverse die. (n/r)
Reverse per obverse ratioRatio of obverse dies divided by reverse dies. (r/o)	3.28	Percentage of singletons (o1)number of coins (n) divided by the number of singletons (o1) ᵖ	%
Original number of dies (O) (Carter 1983 formula)The estimation of the number of coins according to Carter 1983 ᵖ		Coins struck if 20,000 as average productivity per dieCoins made if the average productivity for obverses (according to Carter) is 20,000. ᵖ
Original number of dies (O) (Esty 2011 formula)The estimation of the number of coins according to the singleton formula in Esty 2011 ᵖ (O)		Survival rate if 20,000 as average productivity per dieSurvival rate if average productivity is 20,000. ᵖ	0.00256
Coverage (o = % of O) (Esty 1984 formula)Esty 1984 - coverage (% of O) ᵖ (o = % of O)	%	Die productivity if survival rate 1/2,000Average productivity if survival rate is 1/2,000. ᵖ
Weight of silver (in kg) if 20,000 coins per die (O = Carter formula)Carter 1983 * Median weight * 20000 (*10 if gold or electrum) ᵖ	2,979 kg	Die productivity if survival rate 1/5,000Average productivity if survival rate is 1/5,000. ᵖ

Remarks