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.
The movement looks a bit crude due to its raw finish, but technically, that makes
no difference.
the inner workings
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.
main plate
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".
dial side view
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.
Technical data
Manufacturer
Geneva Sport
Caliber
41
Number of jewels
17
Escapement
Anchor with pallets
Balance
Nickel screw balance
Shock protection(s)
Incabloc
Balance cock direction
counterclockwise
Hairspring stud
fixed
Regulator type
Hairspring key
Movement construction
Fork Escapement wheel, Fourth wheel, Third wheel Center wheel Mainspring barrel
Construction type
solid construction
Bridge shape
Straight bridge, 3 gears
Winding mechanism
yoke
Setting lever spring
3 holes
Features
SCD
Functions
Hour, minute, second
Beats per hour
18000
Size
111/2''' (measured: 25,7 mm)
Image in Flume Werksucher
K2 - / K3 44
Factsheet
Test Results
The movement came in running condition into the lab, but due to the bad
condition of the watch around, it got a full service.
Timegrapher Protocol
On 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 50 years old!
dial down
dial up
12 up
3 up
6 up
9 up
Measured Values
horizontal positions
dial down
+8 seconds/day
dial up
+-0 seconds/day
vertical positions
12 up
-20 seconds/day
3 up
-20 seconds/day
6 up
-15 seconds/day
9 up
-90 seconds/day
timegrapher measurings
The power reserve was nearly 44 hours - a very good value!
