Eterna 12821 Movement Technical Data and Parts List
Eterna 12821 automatic watch movement technical data and parts identification reference. This document provides a detailed visual breakdown of the Eterna 12821 caliber operating at 28,800 beats per hour, with numbered component references for identification and ordering. Features the complete parts diagram showing balance assembly, jewels, screws, springs, gears, and all mechanical components with their reference numbers. Original supplementary technical documentation from 1973/74. Essential reference tool for technicians and watchmakers requiring accurate component identification and specifications for this movement.
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Document Details
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- Pages
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- Watchmaking