Seiko Cal. 4F56A, 8F56A Parts Catalogue & Technical Guide
Seiko Cal. 4F56A and 8F56A parts catalogue and technical guide covering both quartz watch movements. This document provides complete technical specifications including movement size dimensions (Ø18.5 mm for 4F56A, Ø26.4 mm for 8F56A), time indication systems with 24-hour hand, and dual driving systems featuring a step motor and ultrasonic motor for calendar indication. Additional mechanisms include perpetual calendar up to February 28, 2100, train wheel setting device, electronic circuit reset switch, and battery life indicator. Includes exploded component diagrams identifying all major parts with lubrication specifications, battery types (Sony CR1612/Matsushita CR1612 for 4F56A, Matsushita CR2412 for 8F56A), regulation system details, and jewel count (4 jewels). Technical data covers annual rate accuracy, measuring gate specifications, and all caliber-specific technical parameters.
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Document Details
- Format
- Pages
- 4
- Size
- 578.0 KB
- Category
- Watchmaking