Service Guide Cal. V81 Series - Seiko Watch Movement
This is the official Seiko service manual for the Cal. V81 Series quartz watch movement, covering both V810 and V811 variants. The guide provides complete technical specifications for these ultra-thin movements—outside diameter of 15.5mm (measuring 6h to 12h) or 13.0mm (measuring 3h to 9h), casing diameter of 15.1mm, and height of just 3.0mm with zero jewels. The movement operates with 2 or 3-hand time indication driven by a step motor with load-compensated pulse control and includes an electronic circuit reset switch. Monthly rate specification is less than 30 seconds, ensuring reliable timekeeping. Battery compatibility covers SEIKO TR275W, MAXELL SR275W, SONY SR275W, and EVEREADY 319 (1.55V cells with approximately 2-year service life). The workshop manual includes detailed procedures for movement replacement, winding stem removal, and hand installation, plus value checking methodology using the SEIKO Digital Multi Tester S-840A (current consumption specification under 1.4µA). An essential technical reference for watch repair technicians and service centers working with these Seiko quartz movements.
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Document Details
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- Pages
- 1
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- Category
- Watchmaking