The Eterna Caliber 905 stands as a testament to mid-20th-century Swiss horological craftsmanship, cherished by vintage watch enthusiasts and hobbyist watchmakers for its elegant simplicity and robust manual-wind design.
Historical Context
Introduced around 1948 by Eterna, the 905 emerged during the brand’s transition from hammer-wound automatics to refined rotor innovations like the Eterna-matic. Produced into the early 1950s, it powered dress watches and remains rare, often found in 1940s-1950s timepieces with gilt dials or clean casebacks. Its sub-seconds layout evokes pre-war precision, appealing to collectors restoring vintage Eterna pieces.
Technical Specifications
Size: 9.75 lignes (21.6 mm diameter)
Height: Approximately 3.5 mm
Jewels: 17 (friction-set, with potential upgrades via bushings)
Winding: Manual, via signed crown; smooth Eterniflex mainspring
Beat Rate: 18,000 vph (5 Hz)
Functions: Hours, minutes, sub-seconds at 6 o’clock
Balance: Glucydur screwed balance with Nivarox hairspring; Eterna-U shock protection
Hands: 1.30 x 0.70 mm hour; 0.22 mm seconds
Finish: Clean plates with perlage; minimal markings, caliber stamped under balance
For any Watch Spare Parts inquiry, Email us for rate and availability: [email protected]
Watch Parts Enquiry
* If you are unable to fill out any of the required information fields, please type “N/A”.
Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
Mobile/WhatsApp: +91- 9841 360 340