If you look in a watch catalogue, you will see several different looking watches that list the same caliber; many different mechanical brands for example use various ETA calibers; ETA is part of the Swatch group.
The information below is from this site about mechanical watches:
Mechanical Watch FAQ - TimeZone
1.1.1 What is the difference between a movement, an ebauche, and a caliber?
A movement is the completed, finished individual mechanism contained inside the case of the watch, not including the case or dial itself, which is responsible for keeping time. An ebauche is typically understood to mean a "raw" or unassembled, unfinished movement, including the major structural components (plates, bridges) and sometimes parts of the wheel train and other moving parts. A caliber is the collective name given to a series of movements of the same design.
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If you really want to learn you'll go to the various watch sites like watchuseek.com.
There people on this site who have extensive knowledge on a wide range of subjects, but if you wanted to know about S&W revolvers, would you first thought be to go to a watch forum?
I find all types of watches fascinating. If you do decide to check out some sites, read the FAQ's first to get a good background of knowledge.