ETA 255.481-487 Calendar Mechanism Technical Data and Specifications
Technical data and specifications for ETA calendar mechanism models 255.481, 255.483, 255.485, and 255.487. This document provides comprehensive component identification and material references for watchmakers and horologists. Includes detailed dimensional tables covering hand-fitting heights and dial seat clearances for all four caliber variants, with precision dimensional diagrams illustrating the layout and measurements of each calendar mechanism component. Essential technical reference for professionals working with these ETA calendar modules.
Documentation must be downloaded on a computer (PC, Mac, or Linux).
Do not use a smartphone or tablet to download documentation; they generally lack sufficient memory capacity to handle large files, and few users know how to locate the download folder on these devices.
Once downloaded, you can use it right away and even print the pages you need, or use your smartphone in photo mode to translate into the language of your choice: Google Translate
Document Details
- Format
- Pages
- 4
- Size
- 3.3 MB
- Category
- Watchmaking