I found this while browsing and found it quite interesting. https://www.hodinkee.com/articles/servicing-the-speedmster-at-manfredi Even equipped with my Speedy loupe, ultrasonic cleaner (currently full of .308 brass) and a £19.99 watch repair toolkit from Maplin, I would not be tempted to do this at home,
Some discussion on that video here... https://omegaforums.net/threads/interesting-hodinkee-video-on-servicing-the-speedmaster.35847/