Only Online Auction
Geneva, Sep 22, 2021
LOT 306
Beaudroit
Patented pocket circular slide rule; nickel-plated metal
CHF 200 - 400
EUR 200 - 400 / USD 250 - 450 / HKD 1,750 - 3,500TO BE SOLD WITHOUT RESERVE
Sold: CHF 312
Nickel-plated metal, open-face, round-shaped, circular slide rule in the shape of a pocket watch.
Case-back polished.
Silver colour dial.
| Grading System | |
|---|---|
Grade: AA |
Very good |
Case: 3 |
Good |
Movement: 3* |
Good Overhaul recommended, at buyer's expense |
Dial: 3-01 |
Good HANDS Original |
Brand Beaudroit, Seloncourt (Doubs)
Model after Charles Meyrat & Rodolphe Perdrizet patent
Year circa 1890-1900
Movement No. 198
Material nickel-plated metal
Diameter 58.9 mm.
Caliber 22’’’
Weight 230 gr. (approx.)
Signature movement
Notes
Mechanism based on the French invention patent No. 139 898, delivered on November 29, 1880, to Charles Meyrat & Rodolphe Perdrizet, Hérimoncourt et Seloncourt (Doubs), for “Un genre de règle à calcul circulaire ou cadran à calcul” (A type of circular slide rule or calculation dial).
Later, the inventors incorporated their invention in a pocket watch:
Later, the inventors incorporated their invention in a pocket watch:
Mechanism based on the French invention patent No. 165 641, delivered on November 28, 1884, to Charles Meyrat & Rodolphe Perdrizet, Paris, for a “Genre de cercle à calcul combiné avec une montre à mouvement quelconque” (Type of calculating circle combined with a watch with any movement).
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Calculating watch, Meyrat and Perdrizet system
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Calculating watch, Meyrat and Perdrizet system
This calculating watch is a circular slide rule to which a winding watch has been added. To simplify this slide rule, the scales for trigonometric lines were removed.
This invention is published by its authors - Charles Meyrat, an engineer from Hérimoncourt (Doubs), and Rodolphe Perdrizet, an engineer from Seloncourt (Doubs) - in Luxeuil, Imprimerie M. Pattegay, 1899 (10 pp.).
CONDITIONS AND INFORMATION FOR BUYERS
The purchase price payable by a buyer will be the sum of the final bid price plus the buyer’s premium, together with any applicable sales or compensating use tax. In addition to the hammer price, the buyer’s premium is payable as follows: 25% of the hammer price on each lot.Important notice – Special conditions Please look carefully at all the photos as they are an integral part of the description. Any defect not mentioned in the descriptions but visible on the photos will be considered as described and cannot lead to any claim. The dimensions are given as an indication and may slightly differ from the measures mentioned by the manufacturers especially for contemporary watches. The photos are not retouched. Colors may differ from reality. For timepieces, we guarantee neither the functioning nor the precision of the movement, nor the water-resistance of the case. In addition, please note that movements, parts of mechanisms or cases may be incomplete. The lots are sold “as is”, described to the best of our knowledge and cannot be returned. Once the online bid is placed by the bidder, it cannot be cancelled.