Important Wristwatches, Watches & Clocks
Geneva, Hotel Des Bergues, Oct 17, 1992
Phonotélémètre Thouvenin, Breveté S.G.D.G., recommandé par le Ministre de la Guerre, adopté officiellement pour les écoles du Gouvernement, circa 1900.
Unusual silver keyless watch with chronograph, 15 seconds chronograph, sound telemeter,15 minute progressive recorder, special kilometric map distance gauge and compass. Three piece, bassine et filets, polished case, a small compass set in the winding crown and small knurled wheel on the band for the distance gauge. White enamel dial on the front with Roman numerals, outer gauge scale calibrated for 20 Km and inner for 15 km. White enamel dial on the rear face for the 15 seconds chronograph, inner red 5 kilometer telemeter ring and subsidiary minute register. Movement with straight line lever escapement, cut bimetallic balance, Breguet balance spring. Diam. 53 mm.