Pontenet?

 
Pontenet?

Pontenet?

Description

As so often on cylinder movements from the early 20th century, this movement could not be identified, too.

On closer inspection, it reminds a bit of a Pontenet movement, but this is not a 100% match, so it will remain a mystery, who was the manufacturer of this 10 1/2 ligne cylinder movement.

base plate

base plate

For a cylinder movement, it is of fair quality, all important bearings contain rubies.

gear train

gear train

The gear train is typical for a cylinder movement without decentral seconds indication, as the seconds wheel is neither perpendicular nor at 90° angle to the winding stem.

As every cylinder movement, is uses a directly driven center minute wheel, followed by third wheel, seconds wheel and steel cylinder wheel.

side view of the gear train

side view of the gear train

This movement uses a non shock protected three-leg anular balance. The length of the hairspring can be regulated with a long regulator arm to approximate the 18000 A/h. Since it is a cylinder movement, this can really be only an approximation, a daily deviation of a few minutes is standard for these kind of movements, especially after longer use.

dial side

dial side

Interestingly, this movement already uses a yoke winding system with a setting lever and not with a sideways pin, as many cylindermovements did.

So, altogether, this is a well made cylinder movement, probably from the 1910s.

Technical data

Manufacturer:unknown
Caliber:Pontnet?
Size:10 1/2''' (measured: 23,3mm)
A/h:18000
Number of jewels:9
Escapement:Cylinder
Balance types: monometallic anular balance (three legs)
Shock protection(s): none
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • cylinder wheel
  • seconds wheel
  • third wheel, center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Inventory number:21038

Usage gallery

anonymous ladies' watch

anonymous ladies' watch

This movement an watch is a kind donation from Astrid and Detlev to the movement archive. Thank you very much for your great support!