The 444 and 446 is the last derivative from Cymas 12” hunter movement that first came out the late 1920’s. In this review I will stick to calibre 444 and 446, but hope to add the other variations at a later date.
Cyma 444 variations:
12”1 / 214, 216 / 215, 217: 3 train cocks
12”3 / 234, 236 / 235, 237: 1 train cock
444: sub second
446: sweep second
Cyma calibre: 444-46
- Made: aprox 1948-1958
- Made in Switzerland
- Power reserve: 44h
- 15-17 Jewels
- 18000 B/A
- Lift angle 52°
- DM 26.5mm, Do= 27.1mm
- H 3.9mm-4.1mm
Surface finish on the bridges vary from a rather utilitarian brushing with rhodium plating to a finer finished copper plating with beveled edges. All screws are highly polished. The ratchet and crown wheel have different levels of decoration from a basic starburst finish to a rotating starburst pattern and highly polished beveled teeth. The higher jewelled variant has capped upper and lower escape wheel jewels (both in bridges and main plate)
Top surface finish on bridges: 7-8 Points
Surface finish on screws: 9 Points
Surface finish on ratchet and ratchet wheel: 6-8 Points
Movement Jeweling: 6-7 Points
Movement design innovation (1950): 5 points
The Cyma calibre 444-446 base plate is varies in decoration from a rather austere finishing to very fine starburst pattern. Winding/setting mechanisms are nicely finished with a machined yoke spring. The screws are not polished. Gear train has a very good finish. Setting the time feels balanced and smooth.
Base plate finish: 6-7 Points
Setting and winding mechanism: 9 Points
Gear-train finish: 9 Points
Movement durability: 8 Points
A nice feature is the steel ratchet wheel washer that protects the balance bridge from wear. This helps the movement durability. The ratchet click spring is fitted into a grove and screwed in place.
The Cyma calibre 586K has Cymas signature in-house shock protection Cymaflex
3* Bonus points
Cyma calibre 444-446 will keep decent time when in good condition.
Accuracy: 7 points + 3 points for Chronometer rated movement.
Power reserve of 44hours is good.
Power reserve: 7 Points
Omega calibre: 586 points summary:
Surface finish on bridges and top side of base plate: 7/8
Surface finish screws: 9
Surface finish on ratchet and ratchet wheel: 6-8
Movement Jeweling: 6-7
Movement innovative design for ca 1950: 5
Base plate finish: 6-7
Setting and winding mechanism: 9
Gear-train finish: 9
Movement durability: 8
Total bonus points: 3*
Accuracy: 7-10
Power reserve: 7
Grand total: 79-91*
Check out the service video of a Cyma calibre 446
You must be logged in to post a comment.