Not every watch works entry needs to be a deep dive in the hyper technical and complicated complications or decorations! With this brief look, we take a moment to appreciate the very foundation of your watch, the mainplate.
The mainplate is the canvas on which the watchmakers gets to work, it is very much comparable to the chassis of a car. It is on the base plate that all the little bells & whistles will be mounted. And by the use of bridges these smallest of parts will forever be secured on the mainplate (at least until you send your watch in for a service).
The mainplate is, generally speaking, made of plated Brass. The mainplate can also be made from other material such as German Silver, (rose) gold etc.