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Heuer Rattrapante Stoppuhr Semikrograph

Pre-owned () | Year of production 1950 | No original box | No original papers
€880
+ €29 for insured shipping to
Wire transfer
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Shipping and Seller Information

Item is in stock
Anticipated delivery: 01/05 - 10/05
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4,4 ( )

More About This Listing

Basic Info
Listing code GNKY64
Brand Heuer
Reference number Heuer Stoppuhr Rattrapante Semikrograph Militär Artillerie WK WW 2 100er
Movement Manual winding
Case material Steel
Year of production 1950 (Approximation)
Condition
Scope of delivery
No original box, no original papers
Gender Men's watch/Unisex
Location Germany, Schwabach
Price €880 [Negotiable]
Availability Item is in stock

Caliber
Movement Manual winding

Case
Case material Steel
Dial White

Description
This is an automatically translated text.
Stopwatch "Heuer", round white dial with Arabic numerals, second and 30-minute counter, stainless steel case with crown, approx. 5.5cm in diameter without crown, watch runs in short time test

It is a so-called "Rattrapante" with 2 hands for measuring intermediate times (e.g. in artillery), hence the 2 pushers

Stopwatch "Heuer", round white dial with Arabic numerals, seconds and 30-minute counters, stainless steel case with crown, approx. 5.5cm in diameter without crown, watch runs in short time test
What is a semicrograph?

The term semicrograph is an artificial word composed of the Latin semi=half, the Greek micro=small and the Greek graph=writing. It is understood to mean a stopwatch with a scale division of 0.02 (1/50) seconds.

To measure fiftieths of a second, the watch's balance must perform 50 half oscillations per second. This corresponds to a frequency of 25 hertz and is thus 10 times faster than a normal pocket watch balance, which oscillates at 2.5 hertz. The movements of the balance are therefore no longer detectable by the human eye.

Twice as fast are the oscillations of a micrograph with 50 Hz = 100 half oscillations per second. With it, 1/100 of a second can be measured theoretically. Here, the reaction speed of humans must be taken into account, which is in the range of tenths of a second. This means that the high accuracy of these stopwatches cannot be used when operated manually. For this reason, most stopwatches make do with a tenth of a second division.

The movement construction of a semicrograph is similar to that of a ratchet chronograph. To prevent the movement from running down prematurely, the balance is started with a small start lever at "4". On the movement shown here, this lever engages the circumference of the lever disc.

Semi-micrographs are often equipped with a drag hand, which allows to stop split times. In the adjacent picture, the second hand (blue) has already circled the dial three times (3x6 sec) and is at one second and 18/50. The drag hand (gold colored) was stopped at 26/50.

Stopwatches of this design were kept in a case made of sheet metal, which was supposed to protect them on the way to the sports field or to the field. Before use, the retaining clip must be unfolded and the watch removed



Description:

White dial with 100 seconds graduation, gorgeous filigree blued steel hands in Breguet style, case diameter: 54mm, derideck watch with hinge and inner movement protection cover, weight: 110g, stainless steel

Watch starts and stops (accuracy not tested)



ez: 1 - very best general condition, runs on and through, glass best preserved and probably original, crown best preserved, lids close flush, overall condition like new, possibly it is an unused stock piece



History of the sports and military watch manufacture ed Heuer (Source: Chrono24 Magazine):

The history of tag Heuer begins in the 19th century, long before the company was even called tag Heuer. Edouard Heuer founded the watch manufacturer Heuer in 1860, and his watch atelier was then located in Saint-Imier, Switzerland. There, Heuer began developing high-quality timekeeping instruments. It didn't take long for the company to make a name for itself with its remarkable craftsmanship and the precision of its timekeeping instruments.

Heuer not only produced very accurate timepieces, but also created a number of innovations that were to have a lasting impact on watchmaking. One of the most important inventions was the so-called oscillating drive, which Edouard Heuer developed and patented in 1887. The oscillating drive greatly simplified the architecture of the chronograph. Simply put, it is a clutch that connects and disconnects the time stop mechanism and the movement. Thanks to this innovation, Heuer chronographs proved to be very precise and the new mechanism facilitated the manufacturing, setting and maintenance of the movements. The oscillating mechanism is still used by many chronograph movement manufacturers today, which underlines its importance.

Connection to sport
It should come as no surprise that Heuer's high-precision instruments were in high demand in the 19th and 20th centuries. Demand increased even further when Edouard Heuer's son Charles-Auguste Heuer developed the Mikrograph in 1916 - the first mechanical stopwatch capable of measuring elapsed time to the hundredth of a second. After the launch of this timepiece, more and more Heuer instruments appeared at a wide variety of sporting events, including the Olympic Games. In the 1920s, Heuer was the official timekeeper at the Olympic Games in Antwerp (1920), Paris (1924) and Amsterdam (1928).

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Seller

Reiner Haas Einzelfirma
Professional dealer | On Chrono24 since 2020
Schwabach, Germany
74 watches sold
147 active listings
Schwabach, Germany

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