Seiko Cal. H021A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. H021A hybrid analog-digital watch movement. Provides detailed movement specifications (diameter 31.0mm, height 5.5mm, 5 jewels) alongside comprehensive disassembly and reassembly procedures illustrated with numbered component diagrams. Includes lubrication guidelines and systematic component identification throughout. The movement combines a step motor driving system with a multiplexed LCD digital display paired against a traditional 3-hand analog section (hour, minute, second hands). Digital functions cover time and calendar display, world time capability, stopwatch with 1-minute tachymeter scale, and hourly chime signal. An essential service manual and parts reference for technicians working on this integrated quartz hybrid platform.
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Document Details
- Format
- Pages
- 9
- Size
- 257.6 KB
- Category
- Watchmaking