The Poljot 2409 is part of the movement family “Kirowski”, in which Poljot produced until the 1960ies very well made movements.Video on YouTube
The Poljot 2409 uses a contemporary construction, with a central minute wheel and a directly driven center second. An oddity of this movement is, that the screws in this movement are not compatible with western-made screws due to different gradients.
The true speciality of this movement is its balance, which consists of a golden-toned Glucydur screw balance, beared in two inhouse Poljot-Kirowski shock protections and connected to a Breguet type hairspring.
Even though it bears with slow but also contemporary 18000 A/h, it performs very well with very good rates even over long timespans.
Another noteable feature of that 17jewel movement is the escapement wheel, which is on the upper side beared in a shock protection.
On the dial side, there’s of course the yoke winding system with a setting lever spring in an unique bending and two extra large mounting screws.
In the lab
Timegrapher resultHow well this movement performs, even after year long use, can be seen on the timegrapher. Even without any further adjustments, it ran perfect on the horizontal positions and also compensated its errors in the vertical positions. With a little better poising of the balance, it would be capable to run within chronometer specs.
|dial up||-+0 s/d|
|dial down||+-0 s/d|
|crown right (12 up)||-20 s/d|
|crown up (3 up)||+23 s/d|
|crown left (6 up)||+3 s/d|
|crown down (9 up)||-20 s/d|
|Number of jewels:||17|
Glucydur screw balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||2 hole(s)|
|Functions:||hour, minute, second|
|Size:||10 1/2''' (measured: 24,0mm)|
Flume: K3 26|