Coin coffin end teaspoons, unmarked, Ca 1800/1810

These 5 1/2" teaspoons are in excellent condition. No dents, no bowl wear. 3 or 4 have slight bends where the handle thins, but there is no cracking or other structural damage. They are unmarked but I believe they are American because of there looks and particularly because of the featheredge monogram.(picture 2) Ca 1800/1810.