Cook Islands. 20 Dollars 2023 Alcatraz Island, 3 Oz (.999)
No. 83446895
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Final bid
€ 400
1 week ago
Cook Islands. 20 Dollars 2023 Antikythera Mechanism, 3 Oz (.999)
Pulled up from the bottom of the ocean in 1901, the Antikythera Mechanism is thought to be one of the earliest versions of an analog computer! And its early - the machine has been dated back to at least 87BC! Possibly used to predict astronomical events, such as eclipses, the ancient mechanism is the subject of this super collectable.
An absolutely spectacular coin, each huge 65mm, three ounce, 99.9% pure silver Antikythera Mechanism collector issue has been selectively plated in pure gold. Limited mintage of just 111 coins worldwide.
Specifications
Monetary Denomination:
$20
Country:
Cook Islands
Fineness (% purity):
99.9
Metal:
Silver (gold-plated)
Minimum Gross Weight (g):
93.3
Maximum Diameter (mm):
65
Maximum Mintage:
111
No. 83446895
Sold
Cook Islands. 20 Dollars 2023 Antikythera Mechanism, 3 Oz (.999)
Pulled up from the bottom of the ocean in 1901, the Antikythera Mechanism is thought to be one of the earliest versions of an analog computer! And its early - the machine has been dated back to at least 87BC! Possibly used to predict astronomical events, such as eclipses, the ancient mechanism is the subject of this super collectable.
An absolutely spectacular coin, each huge 65mm, three ounce, 99.9% pure silver Antikythera Mechanism collector issue has been selectively plated in pure gold. Limited mintage of just 111 coins worldwide.
Specifications
Monetary Denomination:
$20
Country:
Cook Islands
Fineness (% purity):
99.9
Metal:
Silver (gold-plated)
Minimum Gross Weight (g):
93.3
Maximum Diameter (mm):
65
Maximum Mintage:
111
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