I bought this nice pair of tablespoons in a version of Kings Pattern, single-struck and heavy gauge. The marks are attributed in various places to Maltby Pelletreau, NY, c. 1820s. But neither the marks nor the spoons as a whole feel American to me. They're heavier gauge than one would expect in coin silver spoons, and the pseudo-hallmarks don't look like NYC pseudo-hallmarks. In fact, the marks look a lot like some China Trade silver marks, especially the "C" date letter. The spoons overall seem more likely to be China Trade or British colonial. Informed opinions?