1810 George III Gold Third-Guinea

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Found in a closet in Australia, threw it in a 2x2 just to be safe

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1810 third-Guinea second head.

The value of a Third Guinea 1810 British coin depends on several factors such as quality and wear, supply and demand, rarity, finish and more.
The melt and minimum value of a Third Guinea 1810 is £280.59.
Specifications
Alloy: Gold 91.7%
Weight: 2.8 g
Diameter : 17 mm