Important Modern and Vintage Timepieces.

Geneva, Nov 13, 2010

LOT 551

Longines Staybrite Monopoussoir Caliber 13ZN Double Tachometer, movement and case No. 5525624. Made in the 1920s. Fine and rare, "Staybrite" stainless steel, antimagnetic wristwatch with single-button chronograph, register and two different tachometer scales.

C. Three-body, solid, polished and brushed, wide flat bezel, concave lugs, snap-on case back, button at 2 for start/stop and return-tozero of the chronograph. D. Matte silver with painted black Arabic numerals, subsidiary dials for the seconds and the 30-minute registers, inner 1/5th seconds track, red tachometer scale for measuring distance over 100 meters, outermost black tachometer scale for distance over 1000 meters. Blued steel feuille hands. M. Cal. 13ZN, 13???, rhodium plated, straight line lever escapement with gold anchor, monometallic balance, selfcompensating Breguet balance spring, index regulator. Dial and movement signed. Diam. 34 mm. Thickness 12 mm.