Universal 501

 
Universal 501

Universal 501

Description

With a nominal size of only 5 lignes (12.0 x 15.5mm), the Universal 501 belongs to the smallest windup form movements for ladies’ watches.

It debuted in the late 1950s and shows several classical details.

base plate

base plate

Of course, all important bearings carry rubies; the minute wheel even has got one ruby bearing at the movement side, and the upper escape wheel bearing has got a Girocap cover stone.

gear train

gear train

Because of the limited space, the gear train is pretty compact and build the classical way: The mainspring barrel drives the center minute wheel, followed by third wheel, seconds wheel and escape wheel.

Seconds wheel and escape wheel are both located service-friendly under an own bridge.

side view of the gear train

side view of the gear train

The golden colored Glucydur screw balance with her two legs is beared in two Incabloc shock protections and beats slowly with a rate of 18000 A/h. The exact frequency can be adjusted with a long regulator arm.

Universal 501: Dial side

Universal 501: Dial side

On the dial side you see (besides a larger water damage) the yoke winding system and the rests of the (here unfortunately broken) Incabloc shock protection.

Technical data

Manufacturer:Universal
Caliber:501
Size:5''' (measured: 12,0 x 15,5mm)
Height:3,50mm
A/h:18000
Number of jewels:17
Escapement:Pallet lever
Balance types: Glucydur screw balance (two legs)
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Counterclockwise
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:3 hole(s)
Literature: Ebauches: 1959 142
Flume: K2 -
Inventory number:20054

Usage gallery

Universal ladies' watch  (case missing)

Universal ladies' watch (case missing)