Antik Dragon Japanese & Other Fine Art has dated this piece to the 18th Century.
363297540855).

The case is in perfect condition with no missing stones or damage. The rear plate is not hinged – clips on securely and doesn’t appear to have had a hinge. Lovely gold enamel dial with blued steel hands. Overall the watch is in superb condition with no damage, unmarked glass, in excellent working condition with key. Diameter 39mm, weight 40g. A magnificent collector’s timepiece.
Antik Dragon Japanese & Other Fine Art has dated this piece to the 18th Century.
You can view the stock and full dealer information on the Antik Dragon Japanese & Other Fine Art Profile Page