Unsure of Quality

Can anybody please tell me anything about Grandpa’s fob watch please?

The case is sterling silver (925), hallmarked in London during the assay year 1885/86 and with the JR maker’s (or sponsor’s) mark of Rotherham & Sons, watch & watch case manufacturers of Spon Street, Coventry.


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Do you know what the P is above the JR emblem?
Is K not early 1900s?

Probably a journeyman’s mark; i.e. a mark to show which worker was responsible for the piece.

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