Rolex Caliber 420 Selfwinding - Technical Communication
Rolex Caliber 420 Selfwinding Movement – Technical Parts Reference and Service Manual. Complete technical documentation for the Rolex Caliber 420 automatic movement (Ref. 420, Cal. 7¾", Ø 19.4 mm), designed for watchmakers, repair technicians, and horologists performing maintenance, service, or restoration work. This workshop manual provides detailed exploded component diagrams and precise part reference numbers for every assembly stage: barrel assembly, gear train wheels, ratchet and pawl mechanisms, complete rotor assembly with intermediate wheels, bearings, jewels, hairsprings, and all fasteners. Includes specifications and identification data for accurate parts sourcing and reassembly. Bilingual technical format ensures clarity for international service and repair operations. Essential reference for anyone servicing vintage or current Rolex movements with the 420 caliber designation.
Documentation must be downloaded on a computer (PC, Mac, or Linux).
Do not use a smartphone or tablet to download documentation; they generally lack sufficient memory capacity to handle large files, and few users know how to locate the download folder on these devices.
Once downloaded, you can use it right away and even print the pages you need, or use your smartphone in photo mode to translate into the language of your choice: Google Translate
Document Details
- Format
- Pages
- 2
- Size
- 1.7 MB
- Category
- Watchmaking