Most visitors online was 1990 , on 7 Feb 2022
This book is a good starting point:Thanks for all the answers!
Can you tell me where you find all the informations about old watches and watchmakers?
What literature can you recommend?
Well, it says 'Will: Gib Jun.' on the movement, so I would suppose it would be Gib junior not senior.Considering the style, I would guess it would be Gibb senior. At serial number 99, that is a very early piece by him, so could be first quarter of 18th century.
There is also another very good reason for dating the watch as 1740 or before: the watch is still signed Will. Gib Jun.... I think your watch was made circa 1740 ...
... fits a date of 1740 well ...
It seems that Robert's post has not been followed up by later contributors.quick google search yielded this from British Museum,