Seiko Quartz Cal. 8620A Parts Catalogue
Complete parts catalogue for the Seiko Quartz Cal. 8620A movement, essential for service technicians and watchmakers performing repairs or maintenance on this compact quartz caliber. Exploded diagrams show the exact layout and relationships of all internal components, paired with precise part numbering that allows accurate identification and ordering of replacement pieces. Technical specifications detail the 16.4 × 15.3 mm case dimensions, 32,768 Hz quartz oscillator, two-pole stepper motor configuration, and trimmer capacitor tuning system that governs timekeeping regulation. The detailed parts list assigns identification numbers to every component, eliminating guesswork during assembly or disassembly. Includes critical information on two distinct center wheel and cannon pinion assembly variants, ensuring you source the correct combination for your specific movement variant. Battery compatibility section covers approved replacements including Seiko TR621SW, Seiko SB-DG, Maxell SR621SW, and Toshiba SR621SW cells, so you can confidently specify the right power source. This workshop manual–style reference is indispensable for anyone undertaking Cal. 8620A service, repair, or restoration work.
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Document Details
- Format
- Pages
- 4
- Size
- 92.5 KB
- Category
- Watchmaking