Important Watches, Wristwatches and C...

Geneva, Hotel Des Bergues, Oct 31, 1998

LOT 306

F. Luthi, Horloger a Paris, circa 1920. Fine and extremely rare gilt bronze eight day going mantel regulator with constant force escapement.

CHF 20,000 - 24,000

C. Gilt bronze moulded, standing on four bun-feet and glazed four faces and top, the movement inside, supported by a massive pyramidal white stand. D. Silvered with Arabic numerals and subsidiary seconds. Polished steel Breguet hands. M. Brass circular with cylindrical pillars secured by screws, going barrel and constant force escapement, halfsecond beating invar-elinvar pendulum with spring suspension. Signed on the dial. Dim. 60 x 37,5 x 26,5 cm.


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Grading System
Case: 2

Very good
Movement: 2*

Very good

Overhaul recommended, at buyer's expense
Dial: 2-01

Very good

HANDS Original

Notes

This constant force escapment is based on that invented by L. A. A7eri', exhibited iu 1839, as it was improved the same year by J.-Th. Winne!. It is described and illustrated by Charles Gros in Echa/peutenls d'HorIu1es el de Monlres, 2eme Edition, pp. 219 - 221, fig. 218.