IWC Calibre 851-8541B Technical Communication and Spare Parts Reference
Comprehensive multilingual technical communication from IWC International Watch Co., Schaffhausen, covering calibres 851, 852, 8521, 853, 8531, 854, 8541, 854 B and 8541 B in French, German, English and Spanish. This service manual combines general calibre specifications with detailed dimensional data across all variants, including height ranges from 4.85 to 6.40 mm, oscillation frequencies between 18,000 and 19,800 A/h, and escapement lift angles from 48 to 54 degrees. The base mechanical calibre incorporates shock absorption and automatic winding with a 42-hour power reserve. The spare parts section documents all components with current IWC order numbers for the base calibre, automatic winding module and calendar mechanism, supplemented by a complete cross-reference table mapping discontinued FH/ISO designations to corresponding modern IWC part numbers for each calibre variant. An essential technical resource for qualified watchmakers and service technicians working with these movement families.
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Document Details
- Format
- Pages
- 12
- Size
- 15.0 MB
- Category
- Watchmaking