The Geneva Sport 41 is a rather simple made swiss pallet lever movement, which debuted around 1960. It was equipped with 17 jewels and an Incabloc-beared screw balance, the minimum standard for a good swiss movement.Video on YouTube
The movement looks a bit crude due to its raw finish, but technically, that makes no difference.
The movement is already a modern construction with an extra inner minute gear bridge for the directly driven minute wheel. The center second is also directly driven and its diameter is identical to the diameter of the minute wheel.
The screw balance beats slowly with 18000 A/h. The hairspring is fix connected to the balance cock and can be adjusted in its effective length only directly at the hairspring key.
Since watch and movement both carry a “Sport” in their name, this movement is of course shock protected and uses two Incabloc shock protection bearings for the balance.
The main plate is construction-wise the same as on the Geneva Sport 40, only its outer diameter was extended from 10 1⁄2 to 11 1⁄2 lignes. The briges are still identical and the extra space can be seen on the unused outer “ring”.
On the dial side you see the yoke winding system - for a swiss movement, this is self-evident, especially, when it carries “Geneva” in its name.
In the lab
Timegrapher resultOn the timegrapher, the Geneva Sport 41 provided execllent results on the horizontal position; on the vertical positions, it was less perfect, especially on "9 up". The reason is probably, that the balance wheel has got a quite large horizontal slackness in its bearings, so it starts wobbeling, which slows it down, of course. Nevertheless, the results are quite OK for a rather simple movement, which is about 55 years old!
|Number of jewels:||17|
Nickel screw balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Hairspring key|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||3 hole(s)|
|Functions:||hour, minute, second|
|Size:||11 1/2''' (measured: 25,7mm)|
Flume: K2 - / K3 44|