S 992 - Sidon (Ptolemy IV), silver, tetradrachms (217-215 BCE)

217 BCE - 215 BCE Silver 3,167 kg

Obverse:	Jugate busts to right of Serapis, laureate, bearded and draped, and Isis, crowned, diademed and draped
Reverse:	ΒΑΣΙΛΕΩΣ ΠΤΟΛΕΜΑΙΟΥ (Greek).Eagle with closed wings standing on thunderbolt to left, his head turned back to right, with cornucopiae at his shoulder

Phoenicia

217 BCE

215 BCE

Period: Hellenistic ^{323-30 BC}

Silver

14.20

tetradrachm

Ptolemaic

Die study reference:	"[[Die study reference" contains a listed "[" character as part of the property label and has therefore been classified as invalid.]]1Landvatter 2012, p. 72-74 (Group 6)
Coin series reference:	"[[Coin series reference" contains a listed "[" character as part of the property label and has therefore been classified as invalid.]]2CPE I, n° 934

no distribution is available

Number of obverses ^ᵖ (o)	8	Number of singletons (o1) ^ᵖ	5
Number of reverse dies (r)	17	Number of coins (n)	20
Coins per obverse die (n/o)	2.5	Coins per reverse die (n/r)	1.18
Reverse per obverse ratio (r/o)	2.13	Percentage of singletons (o1) ^ᵖ	62.5 %
Original number of dies (O) (Carter 1983 formula) ^ᵖ	11.15	Coins struck if 20,000 as average productivity per die ^ᵖ	223,000
Original number of dies (O) (Esty 2011 formula) ^ᵖ (O)	13.33	Survival rate if 20,000 as average productivity per die ^ᵖ	0.00009
Coverage (o = % of O) (Esty 1984 formula) ^ᵖ (o = % of O)	75%	Die productivity if survival rate 1/2,000 ^ᵖ	3,587.44
Weight of silver (in kg) if 20,000 coins per die (O = Carter formula) ^ᵖ	3,167 kg <br /> 3,167 kg	Die productivity if survival rate 1/5,000 ^ᵖ	8,968.61

Most likely one single workstation

References

^ Landvatter, Thomas (2012), "The Serapis and Isis Coinage of Ptolemy IV", American Journal of Numismatic, 24, p. 61-90.
^ Lorber, Catharine C. (2018), Coins of the Ptolemaic empire : Part I. Ptolemy I through Ptolemy IV, 2 vol., New York.