Seiko Cal. 7S26A / 7S36A Parts Catalogue/Technical Guide
Technical parts catalogue and service guide for Seiko Cal. 7S26A and Cal. 7S36A automatic watch movements—the 21-jewel and 23-jewel versions respectively that power countless Seiko sports and dive watches. Supplies complete movement specifications including casing diameter (Ø27.4mm) and height (4.9mm), operating frequency (21,600 bph), and full technical rundown of the three-hand display, automatic winding system, quickset date and day calendar functions. The core strength of this manual lies in its detailed exploded-view parts diagrams with every component individually numbered and identified, making teardown and rebuild straightforward. Also covers lubrication schedules and approved oils (Moebius A, Seiko Watch Oils S-4 and S-6) essential for proper movement service and long-term accuracy. Invaluable for watchmakers, technicians, and serious enthusiasts performing maintenance, repair, or complete overhaul of these robust and widely-serviced calibres.
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Document Details
- Format
- Pages
- 6
- Size
- 179.9 KB
- Category
- Watchmaking