This Sir John Bennett Pocket Watch winds and ticks but I don’t know if it keeps good time.
The glass is scuffed and the face has a scratch on it.
The face shows-Bennett, 65 Cheapside, london.
It is not Hall Marked, but it states Fine Silver on the case.
The inscription reads
To Her Majesty The Queen.
Bennett.
65 Cheapside London.
Maker to the Royal Observatory.
The Pocket Watch comes with a key, but it only works to wind the watch, probably not the correct key for this watch.

John Bennett clock and watchmaker career.