Seiko Cal. 2B20A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. 2B20A quartz watch movement. Includes specifications, disassembly and reassembly procedures, detailed parts list with exploded diagrams, lubrication instructions, value checking for coil block resistance and current consumption, and structure of the circuit block. Movement features a step motor, 2 hands with 20-second hand motion, battery voltage 1.55V, and monthly rate accuracy less than 20 seconds.
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Document Details
- Format
- Pages
- 4
- Size
- 97.7 KB
- Category
- Horlogerie