UMF 29-80 (M 2)

 
UMF 29-80 (M 2)

UMF 29-80 (M 2)

Description

In the late 1940ies, Thiel released the caliber “Präzisa”, which was very well made and a fulfilled its name perfectly.

During its production time and even afterwards, this 10 12 ligne caliber was renamed a few times, to ”UMF Präzisa”, to “UMF M 2” and finally to UMF 29-80.

base plate

base plate

The base plate is solidly milled and all bearings, except those from mainspring barrel and minute wheel are equipped with Rubies, in total 15. No comparison to the simple later UMF movements, as the caliber 23.

gear train

gear train

The UMF M2 / 29-80 has got the classical gear train with directly driven center minute, second wheel, third wheel, fourth wheel and escpament wheel. This was standard in the 1940ies and 1950ies.

side view of the gear train

side view of the gear train

The screw-less anular balance is (unfortunately!) not shock protected, but the movement has got a long regulator arm for adjusting the effective hairspring length.

The balance beats contemporarily slow with 18000 A/h and regulates a conventional pallet lever movement of swiss type.

UMF 29-80: Dial side

UMF 29-80: Dial side

On the dial side too, (here stamped as “UMF 2”) you are not disappointed, since the UMF 29-80 uses a yoke winding system.

Technical data

Manufacturer:UMF
Caliber:29-80
Number of jewels:15
Escapement:Pallet lever
Balance types: Nickel anular 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:solid construction
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Features:s
Functions:hour, minute, decentral second
A/h:18000
Size:10 1/2''' (measured: 23,3mm)
Production period:1948 - 1963
Literature: Flume: 1958 g.4
Inventory number:17020