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Is anybody familiar with this JS sponsors or maker's mark that is on this back of the handle of an 1801 London hallmarked tea caddy spoon?

Probably Josiah Snatt, who seems to have made a speciality of caddy spoons.

Phil

Thank you. Because of your reply, I came across V&A Museum example of a Josiah Snatt Tea caddy spoon that looks like it has the same mark as mine.