Teaspoon marked NA in serrated rectangle, circa 1805

Coffin end, incised arch drop. Flynt & Fales page 143 attributes a similar mark to Nathan Adams of Wiscasset, ME. The best known silversmith using an NA mark is Nathaniel Austin of Boston (but this is not one of his published marks). Length 5-1/8". The monogram is a lengthwise sprigged script PG. Overall and mark condition are excellent.