GUB 08-20

GUB 08-20 | - The Movement Archive

GUB 08-20


1969, the Glashütter Uhrenbetriebe (GUB) launched the first (and also penultimate) 5 1/2 ligne ladies' watch movement in contemporary tonneau shape, which supersedes the technically outdated caliber GUB 63.4.

It was produced only until 1972 and then replaced by the later million seller GUB 09-20.

GUB 08-20: base plate

base plate

Quality-wise it was up to date and could keep up with all other (West)German and Swiss calibers of the same type.

GUB 08-20: gear train

gear train

The gear train is typical for these kinds of movements, it uses a directly driven center minute wheel (fully ruby-beared), followed by the two small third and seconds wheels and finally the rather large and filigree escape wheel.

Due to the reduced space, which this shape offers, the dial side bearing of the seconds wheel has to be located above the escape wheel.

GUB 08-20: side view of the gear train

side view of the gear train

The modern anular balance is beared in two inhouse GUB shock protections and beats with 21600 A/h. It can be regulated at the hairspring key only.

As escapement, a swiss plallet lever escapement is used.

GUB 08-20: detail: ratchet

detail: ratchet

All gears are beared unter the large three-quarted bridge. Below the ratchet wheel, there’s there’s the ratchet and its j-shaped spring. A clever solution!

GUB 08-20: GUB 08-20: Dial side

GUB 08-20: Dial side

Of course, the GUB 08-20 uses a yoke winding system, as you can see on the right of the picture.

In the lab

This movement came well used and with a visible water damage into the archive and got a simple service.

Timegrapher result

The results of this heavily used and aged movement are within the expected range.

horizontal positions
dial up +-0 s/d 228° 0.1ms
dial down +-0 s/d 237° 0.0ms
vertical positions
crown right (12 up) +60 s/d 186° 0.0ms
crown up (3 up) -55 s/d 197° 0.2ms
crown left (6 up) -36 s/d 211° 0.3ms
crown down (9 up) -43 s/d 214° 0.0ms

Technical data

Size:5 1/2''' (measured: 13,0 x 15,2mm)
Number of jewels:17
Escapement:Pallet lever
Balance types: monometallic anular balance (three legs)
Shock protection(s): GUB (Glashütter Uhrenbetrieb)
Moveable stud:yes
Adjust mechanism:Hairspring key
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel, mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:5 hole(s)
References: Flume: K3 77
Production years:1969-1972
Inventory number:22068

Usage gallery

GUB 08-20: Glashütte ladies' watch

Glashütte ladies' watch

This movement is a kind donation of the movement archive. Thank you very much for the great support!