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拍品專文
With Breguet Certificate No. 3746 dated 30 April 1982 and additional engine-turned gilt dial with Roman numerals and fleur-de-lys on chased chapter ring, bearing the signature Breguet et Fils.
A witness of Breguet's ingenuity, the present watch is distinguished by its very early micrometer regulation and the kidney-shaped temperature compensation curb mounted on the regulator arm. Evidently made to increase the watches' accuracy, one of his principal focuses, these highly unusual features hitherto unseen in any of Breguet's watches were most probably experimental.
The regulation of the oscillation of the balance by means of a regulator significantly contributes to the increased accuracy of mechanical timekeepers. The regulator used in the present watch is a very early form of the micrometric regulator, allowing an accurate adjustment by means of a segmented rack on the index, fine-tuned by a worm wheel drive. For a note on the invention of the regulator see lot 176 in this sale.
Temperature variations produce a number of effects on watches, most importantly the loss of elasticity in the spiral if made of steel. To compensate such variations, so-called temperature compensation curbs, essentially bimetallic thermometers, were mounted on the regulator for adjustment. Breguet's bimetallic compensation curb was of distinctive, rectangular-curved style, as opposed to the present, kidney-shaped variant.
A witness of Breguet's ingenuity, the present watch is distinguished by its very early micrometer regulation and the kidney-shaped temperature compensation curb mounted on the regulator arm. Evidently made to increase the watches' accuracy, one of his principal focuses, these highly unusual features hitherto unseen in any of Breguet's watches were most probably experimental.
The regulation of the oscillation of the balance by means of a regulator significantly contributes to the increased accuracy of mechanical timekeepers. The regulator used in the present watch is a very early form of the micrometric regulator, allowing an accurate adjustment by means of a segmented rack on the index, fine-tuned by a worm wheel drive. For a note on the invention of the regulator see lot 176 in this sale.
Temperature variations produce a number of effects on watches, most importantly the loss of elasticity in the spiral if made of steel. To compensate such variations, so-called temperature compensation curbs, essentially bimetallic thermometers, were mounted on the regulator for adjustment. Breguet's bimetallic compensation curb was of distinctive, rectangular-curved style, as opposed to the present, kidney-shaped variant.