Certina 721 Balance with Flat Hairspring - Caliber Guide
Technical reference chart for Certina 721 balance mechanism with regulated flat hairspring. Lists base calibers (230, 262, 240, 248, 251, etc.) and applicable compatible calibers with specifications. Includes cross-references for calibers 311 and 324. Chart format with caliber compatibility information.
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Document Details
- Format
- Pages
- 2
- Size
- 1.0 MB
- Category
- Horlogerie