UMF 33-50

 
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UMF 33-50

Description

The UMF caliber 33-50 is one of older versions of the 8 34 ligne midsize caliber, called “Diva”. It has got no shock protection and only seven jewels, but already uses a pallet lever excapement.

It displays hour and minutes only.

The movement itself is very lean constructed and service friendly. On the dial side, almost the whole anchor wheel can be seen, just as on skeletonized movements.

As usual for UMF, this movement has got a rocking bar winding mechanism.

The later models of this movement were released as caliber 39-50.

UMF 33-50 dial side

UMF 33-50 dial side

Technical data

Manufacturer:UMF
Caliber:33-50
Number of jewels:7
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Winding mechanism:rocking bar winding system
Setting lever spring:2 hole(s)
Functions:hour, minute
A/h:18000
Size:8 3/4'''
Literature: Flume: K3 17

Usage gallery

Ruhla ladies' watch

Ruhla ladies' watch

Links