TAG Heuer Chronograph Repair Challenge - Valjoux 7750

Hi, in this video I'll try to fix another mechanical chronograph watch. This is non-working, rusty, and needed small repairs, as usual for me.
I like tinkering with cheap vintage watches. But I always face parts availability issues. Sometimes replacement parts are not available, or even when I can buy them, the cost may be unreasonable.
This movement is Valjoux 7750. I think this is the most tinkerer-friendly chronograph movement. Since this is a very popular movement, there is a lot of good information on the Internet. Although the watch/movement is a bit expensive, we can buy replacement parts easily and reasonably. Also, there are a lot of Chinese "clone" movements. If we don't mind (I mind though), we can replace broken movement with clone movement cheaply.
This is a kind of part 1 of the video series. I managed to fully disassemble, clean, lubricate, and re-assemble. However, this still has some issues. I'll do it all over and try to make this better later soon. If you liked this video, like, comment, and subscribe to my channel!

[@rossjackson3670]

Very enjoyable. A good tutorial for me. I can understand what you are doing and the comments give an additional explanation. How did you remove the stuck screw from the spring barrel? Did you replace with a new spring? Well worth subscribing to you.

[@vintagewatchtinkerer]

Thanks. I broke the screw head with a drill. I used a new spring barrel complete temporarily but I ordered a barrel arbor and new spring to restore it original as possible as I can.

[@pbuehner]

Nice video. I am surprised that you didn't replace the gasket or at least lube it. I thought that was done every time a watch got opened. How do you determine when to do that?

[@vintagewatchtinkerer]

Thanks. I actually did. The tube gasket was unreusable so I replaced with new one. The case gascket was still kind of usable so I lubed it and put it again.

[@pbuehner]

@@vintagewatchtinkerer Thanks for the reply.

[@Cafe-nw6ct]

Bravísimo!!!..Suscrito. Saludos

[@vintagewatchtinkerer]

Thank you for watching and subscribing!