Acquired by Gerd Ahrens on 14 November 1974 at Auktion Koller, Zürich, Lot 3364
Until 23 November 2007: Gerd Ahrens Collection
Sold on 23 November 2007 at Auktionen Dr. Crott, "Sammlung Gerd Ahrens - Luzern. 400 Jahre Entwicklung der Uhrenhemmung", lot 456
Since 23 November 2007: private collection
The pocket watch collection of Gerd Ahrens
The collection of the famous German collector Gerd Ahrens who passed away in Switzerland in 2005, was one of the most significant private collections ever assembled, impressively documenting the technical history of the pocket watch. Following his motto "rare escapements in pocket watches", Mr. Ahrens systematically choose watches with unusual escapements, striking mechanisms or winding systems, covering many technical achievements ranging from the 16th to the early 20th century. Over a period of more than 60 years, he acquired over 700 significant watches, many of them unique pieces. More than 500 of these watches, including the present lot, are extensively described and illustrated in Die Taschenuhrensammlung von Gerd Ahrens by Christian Pfeiffer-Belli, Peter Friess, Josef M. Stadl, Wolf Brüggemann, Norbert Enders.
THE PROPERTY OF A GENTLEMAN
Prominently illustrated and described in Die Taschenuhrensammlung von Gerd Ahrens, by Christian Pfeiffer-Belli (editor), p. 456, vol. 2, Urban Jürgensen Sønner. Urmagerfamilien Jürgensen I fire generationer og deres efterfoolgere by John M. R. Knudsen.
For a short biography of Jules Jürgensen and his work in the field of chronometry see La Mesure du Temps en Mer et les Horlogers Suisses by Estelle Fallet, pp. 79-81.