Movement based on the Swiss patent No. 253 051, delivered on February 15, 1948, to Georges Dubey and René Schaldenbrand, La Chaux-de-Fonds, for a “Chronographe à rattrapante”.
Dubey & Schaldenbrand, “Index-Mobile”
The system “Index-Mobile” was created in 1943-1946 and patented in 1948 by Georges Dubey and René Schaldenbrand, La Chaux-de-Fonds.
It’s a chronograph with double central hands; a simplified sweep-hand construction, in which the two chronograph indicators are linked by a hairspring visible on the dial. The sweep hand is stopped by the coaxial pusher on the winding-crown, but only as long as the finger holds the pusher down. Wheel released, the sweep hand springs to the position of the actual chronograph indicator.
The system was adapted on different 13’’’ calibres, principally on the 13 ¾ ’’’ (Ø 31.25 mm.) Landeron calibres (by Charles Hahn, Le Landeron, near Neuchâtel):
· Landeron 48, from 1940’s to 1970’s.
· Landeron 70, in the 1940’s and 1950’s.
· Landeron 187, in the 1960’s.
· Landeron 248, in the 1970’s.
But also on Venus 188 and on Valjoux calibres.
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.