Important Collectors Wristwatches Po...
Geneva, Hotel Des Bergues, Apr 22, 1995
LOT 164
S. Riefler, D.R.P. No. 50739, München (Germany) D.R.P. No. 100870, dated 1907. Fine and rare mahogany, electric powered wall, centre seconds high precision regulator.
CHF 35,000 - 40,000
USD 30,000 - 35,000
C. Mahogany rectangular with hinged glazed front door. D. Silvered, regulator type with centre seconds, small eccentric hour chapter with Roman numerals from 0 to XI and Arabic from 13 to 23, small Arabic minute chapter above and off-set observation aperture for the remontoir. Blued steel "spade" hands. M. Brass rectangular with battery powered remontoir rewinding a 10 gram weight visible through the dial aperture, every 20 to 40 seconds, according to the state of charge of the 4 volt battery. Riefler escapement with jewelled pallets and jewelled bearings in which the impulse is given via the suspension spring which is re-tensioned by the escapement at each swing of the pendulum. It is thus a constant force escapement in which the suspension spring is used as a remontoire. The pallet frame is supported on knife edges from which the pendulum is suspended as well. There are two escape wheels, one for locking and one for tensioning the suspension spring. Second beating invar-elinvar pendulum. Signed on the dial and pendulum. In very good condition. Dim. 150 x 46 x 22 cm.
