Movements & Components · Anschauungsmodell für uhrentechnik
Anschauungsmodell für uhrentechnik by Hans Köhsl, 1933
- Maker / attribution
- Hans Köhsl (Maker)
- Date
- 1933
- Historical period
- Golden Age of Mechanical Watchmaking (1900 – 1945)
- Country of origin
- Unrecorded in source
- Object type
- Anschauungsmodell für uhrentechnik
- Dimensions
- Höhe: 13.00 cm, Durchmesser: 21.00 cm
- Holding institution
- German Clock Museum
- Accession / object no.
- 2000-053 (inventory number) 29414 (technical number)
- Credit line
- German Clock Museum
- Catalogue title (original)
- Gangmodell "fliegendes Tourbillon", Hans Köhsl, Uhrmacherschule Furtwangen, 1933 (German)
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Record summary
Held and catalogued by German Clock Museum (object number 2000-053 (inventory number) 29414 (technical number)), this is an anschauungsmodell für uhrentechnik by Hans Köhsl, dated 1933. The Atlas places it in the Golden Age of Mechanical Watchmaking period (1900 – 1945) of its Movements & Components collection. Recorded dimensions: Höhe: 13.00 cm, Durchmesser: 21.00 cm. The record is illustrated with 4 photographs.
Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.
Catalogue description
Catalogue description from German Clock Museum
Beim Wort Tourbillon schlagen die Herzen der Taschenuhrenliebhaber schneller. Es gilt als Königsklasse der feinen Uhrmacherei. Doch was ist das Tourbillon eigentlich? Herz eines Taschenuhrwerks ist die Hemmung mit der schnell schwingenden Unruh, die das Räderwerk regelmäßig auslöst und stoppt. Je nach Lage der Taschenuhr unterliegt die Unruh jedoch unterschiedlichen Störungen. Abraham Louis Breguet hatte um 1800 die Idee, die Hemmung mitsamt der schwingenden Unruh langsam um sich selbst drehen zu lassen, so dass die Lagestörungen sich ausgleichen. Der Glashütter Uhrmacher Alfred Helwig entwickelte in den 1920er Jahren sogar ein Fliegendes Tourbillon. Dieses dreht sich scheinbar frei schwebend über dem Werk. Der Uhrmacher Hans Köhsl von der Uhrmacherschule Furtwangen war beeindruckt von Helwigs Konstruktion und baute 1933 dieses Gangmodell. (Deutsches Uhrenmuseum Furtwangen)
Shown in the original language of the source catalogue. An editor-reviewed English translation has not yet been published; we do not publish machine translations as authoritative text.
Historical context
Golden Age of Mechanical Watchmaking (1900 – 1945)
The wristwatch displaces the pocket watch; waterproof cases, self-winding and grand complications.
Precision lever movements, electric clock mechanisms and new alloys (invar, elinvar) characterised the period.
Read the period in the timelineMore movements & components from this periodEarlier: Industrial Revolution
Atlas type guide
Clock and watch movements
The movement is the mechanism of a clock or watch, without its case and dial. It consists of the power source (weight or mainspring in its barrel, sometimes with a fusee), the going train of wheels and pinions, the escapement and oscillator, the motion work that drives the hands, and in many cases additional trains for striking or complications.
From the eighteenth century watch movements were increasingly produced in stages: Swiss and French ébauche makers supplied rough movements that finishers, repasseurs and retailers completed and signed. Calibre numbers — first used systematically by American and Swiss factories in the nineteenth century — make it possible to identify movements, find spare parts and date watches.
What to look for
- Plate and bridge layout: full plate, three-quarter plate, Lépine bar calibre, bridges and cocks.
- Jewel count and whether jewels are set in chatons or rubbed in.
- Signatures, calibre and serial numbers on the plate or under the dial.
- Finishing: Geneva stripes (Côtes de Genève), perlage, bevelled edges, blued screws.
- Fusee and chain, going barrel, or electrical components.
Dating clues
- Full-plate English movements dominate before c. 1850; three-quarter plate and Lépine calibres after.
- Jewelled movements spread after Facio and Debaufre's patent of 1704, mainly in English work until c. 1800.
- Calibre numbers and factory serials allow close dating for industrial production after c. 1850.
General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.
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