I've been making my own movements for fun for a while. Most of the parts you can print/order, but for accuracy purposes I tend to use an existing balance spring (generally sourced from any old Seiko movement).
I recommend 2 books if you want to make your own movements
1) Watchmaking by George Daniels
2) Practical Watch Repairing by Donald de Carle
The first is a textbook and second deals with repairing, but actually taught me the more practical side of how to assemble & regulate a watch, and what makes a movement accurate.
I've made my own hand-winding movement. It is within COSC specs but only when it's more than 75% wound, perfectly flat, and in a cool place. Oh did I mention it's the size of a ping pong bat. It makes me appreciate ETAs and their reliability even more now. It's time consuming and drives me nuts at times but totally worth it.
I recommend 2 books if you want to make your own movements
1) Watchmaking by George Daniels 2) Practical Watch Repairing by Donald de Carle
The first is a textbook and second deals with repairing, but actually taught me the more practical side of how to assemble & regulate a watch, and what makes a movement accurate.
I've made my own hand-winding movement. It is within COSC specs but only when it's more than 75% wound, perfectly flat, and in a cool place. Oh did I mention it's the size of a ping pong bat. It makes me appreciate ETAs and their reliability even more now. It's time consuming and drives me nuts at times but totally worth it.