Valjoux Cal. 7740 & 7741 Technical Data
Technical data sheet for Valjoux caliber 7740 and 7741 chronograph anchor movements—essential reference documentation for watchmakers and horological technicians. The Cal. 7740 is a counting chronograph movement featuring 30-minute and 12-hour recording counters, dual pushers, cam-driven chronograph mechanism, rapid date-correction system, and a beat rate of 28,800 vibrations per hour. The Cal. 7741 variant incorporates 12 and 24-hour totalizer functions for extended timing applications. Complete technical specifications include precise dimensional data in millimeters, detailed component information covering escapement assembly, balance wheel, mainspring characteristics, and jeweling configuration. The service manual features a comprehensive exploded-view diagram with fully numbered parts identification for all movement plates, gear wheels, springs, pivot components, and fastening hardware—invaluable for disassembly, repair, adjustment, and reassembly procedures.
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Document Details
- Format
- Pages
- 2
- Size
- 2.0 MB
- Category
- Watchmaking