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Hello. Can anyone help me identify the mark XIII on the back on an antique spoon? The only other marking is a partial stamp 1 and possibly 0. It was purchased with another spoon engraved with the owner's name (Harriet Williams) and her wedding date in 1785.
Thank you in advance.

Try putting "Spoon [XIII]" in the search function box? You might see a thread there with no remaining image, but a notation by Theo.on some marks that are unidentified. (You may have to do your own comparison of what you have against what was in the description.)

Thank you very much. I appreciate your help.