8,625 CHF
Dekemel-Hebbelynck, Antwerp, circa 1800. Very fine, rare and unusual eight-day going large mahogany marine chronometer with unusual auxiliary compensation. Three- body, with brass handles, the glazed upper section with hinged lid, interesting fusee-like brass chains to hold the upper part in upright position when opened, bottom lined with heavy burgundy satin fabric. Brass bowl and gimbaled suspension, unusual locking device. 145 mm., gilt brass full plate withsimple turned baluster pinned pillars, fusee with chain and maintaining power, Earnshaw spring detent escapement, two-arm cut bimetallic compensation balance (Arnold Z-type) with cylindrical weights, two mean time adjusting screws and two spherical nuts for final micrometric temperature adjustment at the threaded free ends of the bimetallic segments, free under-sprung blued steel helical balance spring of exceptionally small diameter, unusual U-shaped bimetallic curve displacing the beat positio, diamond endstones on both sides of the balance and escape wheel.Signed on dial and movement.Dim. Bowl 147 mm., box 24 x 24 x 21 cm. Notes This chronometer is unusual for its balance spring, of exceptionally small diameter and its two types of temperature compensation - the bimetallic compensation balance and bimetallic compensation curb that only changes the position of the beat. The balance bimetallic segments are constructed by riveting steel and brass lamina and soldering them afterward, the compensation curb lamina are Read more…
Auctioneer:
Antiquorum
Date:
2003-04-12