Poljot 2609H

 
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Poljot 2609H

Description

In the 1970ies, Poljot launched the caliber 2609H. It was the first major modification (denoted by the suffix “H”) of the Poljot 2609, which was not overly successful and/or too expensive in production.

The term “modification” is a little bit misleading here, since it was a complete new construction, on which hardly any part remained untouched. Only the diameter (26mm) and the functions remained the same and that was the reason, why the caliber number 2609 (the code for 26mm diameter, center second, shock protection) hat to be used. For not mixing those two movements and their parts, it got the suffix “H”.

This movement was much more successful than its predecessor and you can find it from time to time in non russian watches, too. Its rugged construction and its probably low order price made it interesting for resellers, which wanted to offer good pallet lever movements in lower priced watches.

base plate

base plate

On this movement, all important bearings with the exception of the small turning mainspring barrel are equipped with synthetic rubies.

base plate with center minute wheel

base plate with center minute wheel

In the 1970ies, directly driven minute hands were no longer state of the art, but that classical construction allows any watchmaker to easily repair the movement.

gear train

gear train

The gear train is also a very classical construction: Mainspring barrel, directly driven center minute, third wheel, directly driven center second and escapement wheel.

side view of the gear train

side view of the gear train

The three-leg anular balance is beared in two inhouse Poljot shock protections. It beats contemporarily medium-fast with 21600 A/h and so faster than its predecessor, the Poljot 2609. The balance controls a conventional pallet lever movement of swiss type.

Spacer of the balance cock

Spacer of the balance cock

The Poljot 2609H uses a rather odd mechanism to adjust the height of the balance cock: Between it and the base plate, there are more or less (both, two and three were already observed) very flat metal sheets, either gilt color or dark.

escapement lever cage

escapement lever cage

The upper lever bearing, which is a 360° bridge is much more professional and ensures good stability.

Lever

Lever

The lever builds unusually high for a pallet lever movement. Its lower axle is especially long, since the lower (dial side) bearing it deep down on the base plate.

open dial side

open dial side

The setting lever is not screwed, but a spring construction.

Poljot 2609H dial side

Poljot 2609H dial side

On the dial side, you see the yoke winding system and the cover of the changing wheel, which also saves (but against what?) the yoke winding system.

In the lab

The movement shown here came as NOS into the lab and directly into the timegrapher. No revision and no adjustments were done.

Zeitwaagen-Ausgabe



horizontale Lagen
dial up +20 s/d 255° 0.3ms
dial down +15 s/d 240° 0.2ms
vertikale Lagen
crown right (12 up) +24 s/d 223° 0.2ms
crown up (3 up) +17 s/d 203° 0.2ms
crown left (6 up) +20 s/d 232° 0.3ms
crown down (9 up) +11 s/d 224° 0.3ms

Technical data

Manufacturer:Poljot
Caliber:2609H
Number of jewels:17
Escapement:Pallet lever
Shock protection(s): Poljot
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel
  • center minute wheel
  • mainspring barrel
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Features:SCD
Functions:hour, minute, second
A/h:21600
Size:11 1/2''' (measured: 25,8mm)
Inventory number:17017
This movement was donated by Hans. Thank you very much for the support of the movement archive!