In 1950 Cyma Tavannes released a brand new movement. It features a unique balance cock/bridge that featured their in-house shock protection: CymaFlex and the sweep second variant had a adjustable tension spring on the sweep second pinion.
Cyma calibre 454 variations:
454: 9.75”’, sub second
455: 10.5”’, sub second, calendar, date and month
456: 9.75”’, sweep second
458: 10.5”’, sub second
459: 10.5”’, sweep second
Cyma calibre: 454 series:
- Made: aprox 1950-1966
- Made in Switzerland
- Power reserve: 42h
- 17 Jewels
- 18000 B/A
- Lift angle 52°
- DM 22.5-23.7 mm
- H 3.5-3.6mm
Surface finish on the bridges go from adequate to very fine Côtes de Genève with rhodium plating and beveled edges. All screws are highly polished. The ratchet and crown wheel have a basic starburst finish. Escape wheel has a cap jewel on both ends.
Top surface finish on bridges: 7-8* Points
Surface finish on screws: 8 Points
Surface finish on ratchet and ratchet wheel: 6 Points
Movement Jeweling: 7 Points
Movement design innovation (1950): 8 points
The Cyma base plate is well decorated with a starburst pattern. Setting and winding is smooth. Gear train is of a high finish.
Base plate finish: 7 Points
Setting and winding mechanism: 7 Points
Gear-train finish: 8 Points
Movement durability: 7 Points
The Cyma calibre 454 series all have Cyma’s signature in-house shock protection Cymaflex.
The Cyma calibre 455 series has a day, date and month complication. The Day and date changes at midnight. The date also has a quick advice feature. While the Month is moved manually.
Day: 4
Date: 5
Month: 3
Cyma calibre 586 will keep good time when in good condition.
Accuracy: 7 points
Power reserve of 42 hours is good for a movement this size.
Power reserve: 7 Points
Omega calibre: 586 points summary:
Surface finish on bridges and top side of base plate: 7-8*
Surface finish screws: 8
Surface finish on ratchet and ratchet wheel: 6
Movement Jeweling: 7
Movement innovative design: 8
Base plate finish: 7
Setting and winding mechanism: 7
Gear-train finish: 8
Movement durability: 7
Total bonus points: 0
Complications: 12*
Accuracy: 7
Power reserve: 7
Grand total: 79-91*
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