GUB 75
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| GUB 75 |
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Description
The GUB 75, the so-called "Spezimatic" movement of the Glashütter Uhrenbetrieben, is
one of the most successful and most popular selfwinding movements of german production.
It is constructed with a three-quarter main bridge, which is typical for Glashütte, but
difficult to service, since that bridge houses all gears, those of the time system as well
as those of the selfwinding system.
The time system is constructed in a quite modern manner, since it already uses an indirectly
driven center minute hand and also an in directly driven center second hand. That construction
allows more space for a larger balance (here a screwless, three-leg Glucydur balance) and
a larger mainspring barrel.
The balance is secured in two inhouse (GUB) shock protection systems and beats slowly with
18000 A/h. The hairspring is fix connected to the balance cock and is regulated in its
effective length by a fork-like regulator arm.
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| detail: mainspring barrel bearing |
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With a height of only 5.05mm, this movement is very flat. The mainspring barrel can be
removed without disassembling of the movement by removing its axle from the dial side.
The oscillating weight is secured by a spring (which flies very well :-)) on its axle.
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| movement view without rotor |
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The caliber 75 (later called as 06-26) was produced between 1965 and 1980. Together with
the caliber 74 (same movement, without date indication), almost 3 million movements were
made.
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| dial side view |
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The date mechanism is below a plastic bearing plate. This is an unfortunate solution, since
the plastic ages and get loose, as you can see on the photos at the regions of the screws.
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| date mechanism |
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A pretty genious solution was made for the quickset mechanism: By turning back the time for three
hours, the date wheel slips below the date ring and avoids turning it back. This is possible,
since the date wheel can slip a bit down, since it has got a spring below, as you can
see on the following picture:
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| date mechanism: vertical coupling |
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Of course this movement has got a yoke winding system. On the lower left end of the
setting lever bridge, you can see the bearing and securing of the mainspring axle. When you remove
the bridge and axle, you can remove the mainspring barrel from the movement without dissecting
it.
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| dial side without date mechanism |
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Technical data
| Manufacturer | GUB |
| Caliber | 75 |
| Number of jewels | 26 |
| Escapement | Anchor with pallets |
| Balance | Glucydur |
| Shock protection(s) | GUB (Glashütter Uhrenbetrieb) |
| Balance cock direction | counterclockwise |
| Hairspring stud | fixed |
| Regulator type | Hairspring key |
| Movement construction | Fork
Escapement wheel, Fourth wheel, Third wheel, Center wheel, Center second pinion, Mainspring barrel |
| Winding mechanism | yoke |
| Setting lever spring | 3 holes |
| Features | SCI,QG,RDR,AUT |
| Functions | Hour, minute, second, day, selfwinding |
| Beats per hour | 18000 |
| Size | 121/2''' (measured: 28,0 mm) |
| Image in Flume Werksucher | K3 - |
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| Factsheet |
Usage gallery
