The Vintage Wrist Watch Company has dated this piece to the 1880s.
The movement is signed Baume Longines and it is protected by an inner hinged cover which is engraved with the name Jms Gaydon, Barnstaple (there was a Barnstaple watchmaker / jeweller called Gaydon so it could refer to them as they were probably the original retailers of the watch).

The watch measures 41mm diameter excluding the stem and the loop. The case is silver and there are hallmarks inside both of the case backs for London 1884 with the initials of Arthur Baume, the London based agent for Longines. The case has some fairly gentle unevenness to the back but overall looks very acceptable for such an early piece.

The watch glass is in good condition.
The enamel dial has a very faint hairline crack between 7 and 8 but you have to look quite closely to see it. Blued steel hands and an outer minute track.
The watch comes in a vintage presentation box, probably not from the original retailer as it is from Edinburgh but possibly a subsequent retailer.
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The Vintage Wrist Watch Company has dated this piece to the 1880s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page