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School chronometer, Peseux 260

CHF 5,000


Extremely rare and fine, 36mm stainless steel school watch “Ecole d’Horlogerie St.Imier” housing famous Peseux 260 competition chronometer movement No.111 (numbered on the bridge and under the balance). Features stunning clean dial with Arabic numerals and transparent caseback.

Competition chronometer-quality wristwatch movements are not “ordinary” C.O.S.C. certified movements. These movements were designed and finished to excel in the rigorous world of Observatory Competitions, as conducted in Geneve and Neuchatel in the years 1944 through 1967.

Back when the development of observatory chronometers and occurrence of precision timing competitions in Geneve and Neuchatel were in effect, the Peseux 260 was introduced purely for research purposes. This ebauche made by Peseux S.A. was made exclusively for the Observatory Competitions and supplied to a number of different independent and high-end manufactures as a starting point for their competition entries. Because of this, it is said that watches bearing the Peseux 260 were never made available to the public consumer, so over the period of 23 years Peseux produced a little over 3300 movements.

Watch is in overall great condition, running and ready to wear!


Brand Ecole d’Horlogerie St.Imier
Model Peseux 260
Reference n/a
Year 1950s
Movement Manual-winding
Calibre Peseux 260
Case material Stainless Steel
Case size  36 mm
Bracelet n/a
Features Competition chronometer movement
Box/Papers no box, no papers


In fully working order, recently serviced. Great, almost mint condition, minor surface scratches and scuffs through the age. No box, no papers.

Watches are sold as-is, and there is no guarantee of to be waterproof or movement accuracy, due to the nature of vintage watches. Please view all the pictures carefully as they form an integral part of the description. Any defects not mentioned but visible in the pictures will be considered as described.


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