SOLVIL / Paul DITISHEIM, Chaux-de-Fonds, Switzerland. No 720786


Rare keyless watch by this most important maker, with Patent balance and state-of-wind indication, circa 1925.

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Slim nickel chromed Swiss made case, the cuvette listing just some of the awards won by Ditisheim. Nickel barred movement jewelled to the centre. Straight-line, club-tooth, double-roller lever escapement. Elinvar balance-spring, uncut monometallic balance with Ditisheim’s Patent compensation balance with affixes. Beautiful signed enamel dial with up/down indication at 12, in prefect condition, original blued-steel hands. 49 mm diameter.

Paul Ditisheim SA, Fabrique d'Horologerie Ditis & Solvil. Formed in 1920, after more than twenty years of the greatest success in the English and Swiss watch and chronometer Trials, in which Ditisheim developed a series of improved and Patent balances. Swiss Patent No 91169, August 1920, described by Ditisheim in his article 'Demonstration of (a) A New Balance for Compensating the Temperature Error of watches and Chronometers... published in the Proceedings of the Physical Society of London, Vol 35, Part 5, August 15, 1923. See also his article 'The Timing of Chronometers, a Review of the History and Progress of Adjusting,' printed in English Mechanics magazine, March-April 1926. This is one of two types of balance found in these watches, the other has the compensation placed within the rim, as opposed to being an affix. 

NB: Most such examples that survive do not have the very rare state-of-wind feature - I show a contemporary advert of 1926 for this rare calibre. See also the book on Ditisheim by Osterhausen, pages 68-9.

A most wearable watch with a beautiful dial, still capable of showing what a quality watch of circa 1925 could achieve. With no obvious faults other than some light scratches to the case and movement consistent with its age. Please also note that these Ditisheim cases are very strong and need a case opener to reveal the movement. Serviced and guaranteed.