H.F.Bauer 10 1/2 old

 
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H.F.Bauer 10 1/2 old

Description

Most likely in the 1930ies, the manufactury from Herrmann Friedrich Bauer in Pforzheim, Germany, launched their 10 12 ligne movement Bauer 10 12 old. The suffix “old” was added later, when the relaunched version of this movement was available as Bauer 10 12 new

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.

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.

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.

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
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
Construction:
  • 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)
Features:s
Functions:hour, minute, decentral second
A/h:18000
Size:10 1/2''' (measured: 23,0mm)
Literature: Flume: Jacob 1942
Inventory number:19004

Usage gallery

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!