2-day marine chronometer of special construction. Brosse a Bordeaux (France), circa 1830.

2-day marine chronometer of special construction. Brosse a Bordeaux (France), circa 1830. Brosse a Bordeaux (France), No. 24, circa 1830. Very fine and unusual 2-day marine chronometer of special construction. C. Two-body, mahogany, top with sliding panel to reveal the dial, fixed brass handles, lock in front, bracket for key in the left rear corner. Gimbaled bowl with poising weight at the bottom, threaded glazed bezel. D. Silvered, champleve Roman numerals, outer minute track, subsidiary seconds. Blued steel "spade" hands. M. 96 mm, brass, 3/4-plate, going barrel, Earnshaw spring detent chronometer escapement, unusual cut bimetallic compensation balance with brass arm and bimetallic rims screwed to the arm bracket, Earnshaw-type trapezoidal sliding temperature weights, two mean-time screws, blued steel free-sprung helical balance spring with terminal curves fastened to adjustable stud. Signed on the dial. Dim. 20 x 20 x 18 cm.