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Sorry no US silver dollar coins dated 1826
Your coin is either a copper Penny, a Halfpenny or a Farthing with George IV on the front and a seated Britannia on the reverse. The Farthing is 22 mm in diameter. The Halfpenny is 28 mm in diameter. The Penny is 34 mm in diameter.
Check that coin again. The U.S. didn't mint any $1 coins (in either gold or silver) dated 1826.
around 129 dollars
Please check again and post a new question. The US didn't mint any half dimes dated 1826.
100-1000+ depending on condition, accessories, etc..
You have a British coin ("Georgius IV D.G. Britannia Rex F.D." is abbreviated latin for "George the Fourth, King of Britain and Defender of the Faith") dated 1821. To get a value, the denomination and condition of the coin would need to be known.
Assuming the coin is circulated and still in collectible condition. The 1826 Matron Head Large Cent is a fairly common coin of this series. For a accurate value, the coin needs to be seen and graded. Most show very heavy wear with values of $25.00-$50.00.
The result of subtracting 1735 from 1826 is 91.
Adams died in 1826.
Photography was invented in 1826