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Baumgartner 844


Baumgartner 844Baumgartner 844


Probably in the mid 1970ies, Baumgartner released the caliber family 844 with different features. They contained besids an optional center second also different beating rates, different sizes and even a day/date indication.

The Baumgartner 844 described here only offers the basic functionality, hour and minute indication.

 base platebase plate

This movement has got a pillar construction; there are now bearing jewels but for the balance staff.

Its construction is basically identical to the Baumgartner 896 with the only difference, that the caliber 844 has got no distict cock for the lever and so everything(!) resides below the one and only main plate.

gears and trainsgears and trains

With its dial side driven hands and a directly driven center second (not used here), the gears and trains are modern.

side view of the gears and trainsside view of the gears and trains

The large three-leg ring balance beats on the specimen shown here with only 18000 A/h and controls a pin lever movement. The balance is secured against shocks in two KIF Trior bearings.


The ratchet is a very simple construction, it consists of only one specially shaped spring with a dot on its top. This dot interferes with the ratchet wheel. These kind of ratchets are often found on contemporary movements, even in more expensive ones.

mainspring barrelmainspring barrel

The mainspring barrel consists of three gears. The lowest one drives the movement, the large top wheel the minute cannon pinion and the small top wheel the hour pinion. The two gears on the top are fix connected with each other and are mounted with a slipping clutch onto the mainspring barrel. With that Roskopf construction, there's no need any more for a changing wheel on the dial side.

Baumgartner 844 dial sideBaumgartner 844 dial side

On the crude dial side, you see the yoke winding system, and, if you look exactly, at 5 o'clock the interfering of the hour wheel into the upper mainspring wheel.

 Technical data

Number of jewels2
Escapementpin lever
Shock protection(s)KIF Trior
Balance cock directioncounterclockwise
Hairspring studmoveable
Regulator typeHairspring key
Movement constructionFork, Escapement wheel, Third wheel, Large driving wheel, Mainspring barrel
Construction typepillar construction
Winding mechanismyoke
Setting lever spring1 holes
FunctionsHour, minute
Beats per hour18000
Size101/2''' (measured: 23,8 mm)
Baumgartner 844BaumgartnerBaumgartner84410 1/2'''Baumgartner 8442 Jewels, 10 1/2''', 18000 A/h


In the lab

The movement shown here was visually in good condition, but didn't run well. After a service, the cause was clear: The axle of the second wheel was broken. This is a pretty unusual error, maybe a cause of too tight windup with too much force.


Usage gallery

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