Cyma 416Ka

Description

The Cyma 416Ka, a 10 1/2 ligne windup movement from the late 1940s with indirect center seconds indication and inhouse shock protection origins from the swiss city of Tavannes.

Quality-wise, this movement is made very well. On the base plate, you see a very nice perleage in the visible area, and of course, all important bearings contain rubies.

The upper side of the gear train and mainspring barrel bridges have a strip decoration, which unfortunately cannot be really seeon on the photo.

The three ruby bearings of the gear train bridge are beared in chatons.

The Cyma 416Ka uses the classical gear train with directly driven center minute wheel, third wheel, seconds wheel and filigree steel escape wheel.

The indirect center seconds pinion is driven by a second wheel on the upper pinion of the third wheel. A thin spring prevents the center seconds pinion from fluttering by applying a little bit of force sideways.

The swiss pallet lever movement of this movement is regulated by a monometallic screw balance, which beats contemporarily slow with 18000 A/h and can be adjusted with a long regulator arm with specially shaped end.

The balance is secured in an inhouse Cymaflex-I shock protection.

On the dial side, too, there are very beautiful perleages. Aesthetically, this movement is really top notch and technically, with its early inhouse shock protection and its yoke winding system, it is very well made, too.

In the lab

Timegrapher result

In the horizontal positions, the rates are pretty impressive, but with a little low amplitude; vertically, you see the age and wear of this movement, since the amplitude breaks in heavily, altough the variance of the rates is gratifying low.
Really impressive is the very low bear error. On a movement with fixed hairspring stud, this is amost impossible to achieve.

Technical data