This article is a temporary fix for categories that do not otherwise display.
Torsion (400-day) pendulums
Clock winding mechanisms
Marine chronometers are a problem. Except for size and casing they have very strong affinities to watches and so are placed here.
Superior categories: Cat link|Encyclopedia : Cat link|Watches : Cat link|Watch types by social function : Cat link|Navigation watches
Classification of watches according to their function in society.
This category is a classification only and should not be used in articles.
Superior categories: Cat link|Encyclopedia : Cat link|Watches