Seiko Cal. Y621A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko Cal. Y621A automatic winding watch movement. Includes detailed exploded diagrams of movement components, complete parts list with part numbers (screws, jewels, gears, wheels, springs), specifications (27.4mm diameter, 17 jewels, 21,600 vibrations per hour), and assembly/disassembly instructions with lubrication points indicated. Features three hands time indication with automatic winding, date calendar, and instant calendar setting device.
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Document Details
- Format
- Pages
- 3
- Size
- 180.6 KB
- Category
- Horlogerie