Seiko 6139B Automatic Chronograph Technical Data and Parts List
Seiko 6139B automatic chronograph technical manual and parts reference covering the complete caliber 6139B movement. This 17-jewel mechanism delivers a 30-minute chronograph recorder integrated with calendar functionality and shock-resistant construction rated for 27.00 mm case diameter and 7.10 mm maximum height, operating at 21,600 vibrations per hour. The service manual supplies detailed component diagrams and exploded views for each assembly, full part numbering for ordering replacements, and comprehensive material specifications alongside comparative data for the related 6139A caliber. Essential for watchmakers, repair technicians, and horologers performing maintenance, overhaul, or restoration work on vintage Seiko chronographs of this series.
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Document Details
- Format
- Pages
- 4
- Size
- 256.1 KB
- Category
- Watchmaking