I have a pair of Celtic Point egg spoons with the town mark for Edinburgh, the tricuspid George III duty mark for 1797-8 and an unfamiliar maker’s mark of G&M (the ampersand is of the Saxon variety and not the more common Roman type).
Jackson’s doesn’t offer any clues. I believe there have been recent developments in ascribing Scottish marks and there are several books now with more recent and up to date information. Unfortunately I do not posses these books, but perhaps someone here does. Can anyone shed any light on the makers of these spoons please?