Lovely Shovel Caddy Spoon, Assay Office? Maker Confusing?

[AGAG]

Dear all, A nice Shovel shaped caddy Spoon with no assay office mark and I am confused about possible maker, It is JS in rectangular box, no dots between Jand S and so too early for James Swann,
Looks Like London P fro 1810 but not 100%
any comments





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[Neruda]

Probably John Sanders. 1810 fits.
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