Eterna Caliber 1323: A Vintage Workhorse for Enthusiasts
Vintage watch lovers and hobbyist watchmakers cherish the Eterna Caliber 1323 for its robust engineering from the mid-20th century Swiss horology golden age. Produced during Eterna’s peak automatic movement era, this compact caliber powered countless dress and tool watches, blending reliability with subtle innovation. Its design reflects post-WWII precision, ideal for restoration projects or collection builds.
Historical Context
Introduced around the 1950s-1960s, the 1323 evolved from Eterna’s pioneering Eterna-matic rotor automatics. It shares DNA with calibers like 1318 and 1322, emphasizing bi-directional winding efficiency. Often found in Eterna KonTiki divers and dress models, it embodies the brand’s ball-bearing rotor legacy, reducing wear for decades of service.
Technical Specifications
Size: 8.75 lignes (19.4 mm diameter), 4.6 mm height—slim for vintage cases.
Type: Automatic, self-winding with central rotor on 5 tiny ball bearings (0.65 mm each).
Jewels: 17 or 25 jewels, depending on variant.
Frequency: 18,000 vph (2.5 Hz), Glucydur screw balance, Nivarox hairspring.
Functions: Hours, minutes, center seconds; optional date at 3 o’clock.
Winding: Bi-directional via Eterniflex mainspring and double-click ratchet.
Shock Protection: Eterna-U system for durability.
Power Reserve: Approximately 40-45 hours.
Finish: Perlage on bridges, signed rotor.
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
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