Phocis (various mints) (Phocian League), electrum, obols (Siren/bucranium) (356-346 BCE)

Die Studies Database

SILVER ID ^ᵖ: 31257

356 BCE - 346 BCE Electrum 2,230 kg

Description

Obverse:	Siren standing r., holding tympanon
Reverse:	Bucranium with filleted horns

Mint and issuing power

Mint:

Phocis (various mints)

Ancient region:

Phocis

Modern country: Greece

Authority:

Phocian League

Chronology

From

356 BCE

to

346 BCE

Period: Classical 480-323 BC

Physical description

Metal:

Electrum http://nomisma.org/id/el

Median weight in grams

1.00

Denomination:

obol

Standard:

Image

]]Phocians_elect_siren_bucran.jpg [1]

References

Die study reference:	"[[Die study reference" contains a listed "[" character as part of the property label and has therefore been classified as invalid.]]1Fischer-Bossert 2025
Coin series reference:

Obverse dies distribution

Frequency ᵖ	Number of obverses ᵖ (o)	% (o)	Number of coins (n)	% (n)	Die name
3	1	12.5	3	15	5
1	3	37.5	3	15	1, 6, 8
2	2	25	4	20	3, 7
5	2	25	10	50	2, 4
Total	8 of 8	100	20 of 20	100

Reverse dies distribution

no distribution is available

Quantification

Number of obverses ᵖ (o)	8	Number of singletons (o1) ᵖ	3
Number of reverse dies (r)	3	Number of coins (n)	20
Coins per obverse die (n/o)	2.5	Coins per reverse die (n/r)	6.67
Reverse per obverse ratio (r/o)	0.38	Percentage of singletons (o1) ᵖ	37.5 %
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)	85%	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	2,230 kg <br /> 2,230 kg	Die productivity if survival rate 1/5,000 ᵖ	8,968.61

Remarks

Most likely one single workstation