The Remarkable Pocket Chronographs of the Gerd-Rüdiger Lang Collection

The true story of Swiss watchmaking

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24 07, 2026
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- Lots 72

This movement remained a mystery for quite some time. Its design bears a strong resemblance to the movements from St. Imier, which is why it was once thought to have been made by Droz & Cie (Bern). The recent discovery of a chronograph signed “Revelator” and equipped with this movement has led to it now being attributed to Albert Jeanneret & Frères (later Excelsior Park). See here for more information on Albert Jeanneret & Frères.

- Lots 79, 106, 122 et 74

These three chronographs, one of which is signed “Leroy à Paris,” feature movements from the Guinand family of Les Brenets (the patriarch was Charles-Léon, followed by Olga and then Georges-Henri Guinand).

This is likely also the case with this curious chronograph featuring a regulator dial:

There are three movement variants for this type of dial: Guinand, Breitling, and Henchoz. The latter was also offered for sale that day and is shown below.

- Lots 82

This split-seconds chronograph has the same dial as Lot 74 but a different movement. This one is by Henchoz Frères of Le Locle, and it was registered in 1891.

- Lot 81

This chronograph without sub-dials—formerly known as a “simple chronograph”—features a movement manufactured by Clémence Frères in La Chaux-de-Fonds. It was patented in 1889 (Patent CH 259).