H.F.Bauer 10 1/2 old

H.F.Bauer 10 1/2 old | 17jewels.info - The Movement Archive

H.F.Bauer 10 1/2 old


Most likely in the 1930ies, the manufactury from Herrmann Friedrich Bauer in Pforzheim, Germany, launched their 10 1/2 ligne movement Bauer 10 1/2 old. The suffix “old” was added later, when the relaunched version of this movement was available as Bauer 10 1/2 new

H.F.Bauer 10 1/2 old: base plate

base plate

You can see the state of the art of that time: Brass/gilt colored base plate with ruby bearings for all fast turning gears.

Even when it’s not visible at the first glance, this is a pillar construction. It is hidden very well by the cocks and bridges, whose edges are solid and go down till the base plate.

H.F.Bauer 10 1/2 old: gear train

gear train

We have the classical gear train with directly driven center minute wheel, third wheel, seconds wheel at 6 o’clock (with prolonged axle, which carries the decentral seconds hand on the dial side) and escape wheel.

H.F.Bauer 10 1/2 old: side view of the gear train

side view of the gear train

Of course, the screw balance is not yet shock protected. It beats with 18000 A/h and regulates a classical swiss type pallet lever movement.

Its exact beat frequency can be adjusted with a long regulator arm and and engraved scale on the balance cock.

H.F.Bauer 10 1/2 old: Bauer 10 1/2 old: Dial side

Bauer 10 1/2 old: Dial side

There are no surprised on the dial side, it’s all state of the art of that time. As usual on better movement, there’s a yoke winding system.

If you look exactly, you can spot the mountings for the riveted pillars.

Technical data

Manufacturer:Bauer H.F.
Caliber:10 1/2 alt
Size:10 1/2''' (measured: 23,0mm)
Number of jewels:15
Escapement:Pallet lever
Balance types: Nickel screw balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Construction type:pillar construction
Winding mechanism:yoke winding system
Setting lever spring:4 hole(s)
  • s (decentral seconds)
References: Werksucher: Jacob 1942
Inventory number:19004

Usage gallery

H.F.Bauer 10 1/2 old: Technos gents watch

Technos gents watch

This movement together with its watch was kindly donated by Christoph Reiner. Thank you very much for supporting the movement archive!