Fine Swiss gold watch with one minute tourbillion Circa 1865

Gold tourbillion watch with chronometer escapement
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A very fine and very rare Swiss 18 Carat gold pocket watch with one minute tourbillion regulator and pivoted detent chronometer escapement, made by Ulysse Breting Le Locle for Victor Siegfried, Strasbourg, escapement by Ernest Guinand, circa 1865.
Nickel plated movement with, wolf’s tooth winding wheels, gold wheel train, Guinand 2 type carriage (Meis classification) with pivoted detent chronometer escapement, cut bimetallic compensation balance with gold screws, Breguet blued steel balance spring with perpendicular stud for preventing excessive amplitudes, index regulator with gold scale plate, the entire train jeweled.
Case polished with curved bezel, reeded band, engine-turned back cover with polished border, the inside inscribed: Rudolf Filzwieser, Wien, with an engraved basket of flowers, massive bow, hand-setting slide in the band. Glazed gold rimmed cuvette.
White enamel dial with radial Roman numerals, outer minute track, large subsidiary seconds. Gold and rose diamond set Ulysse Breting type hands. Dial and movement signed by the retailer. Front-plate signed by the maker, case and movement punched with the same number.
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Diameter: 55 mm
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Signed: Victor Siegfried à Strasbourg
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Ernest Guinand (c. 1810-1879). Guinand was an important Master Horologist from Le Locle, who, along with Auguste Grether from Ponts-de-Martel (1817-1879), specialized in the production of tourbillon carriages. According to the records of the Neuchâtel Observatory, Guinand’s production of tourbillons began between 1865 and 1867. He designed three models of Tourbillon carriages, always based on an A-shaped frame. He worked for several important makers, including Girard-Perregaux and Montandon. Most of Guinand?s carriages were equipped with a pivoted detent escapement, one with spring detent and some with lever escapement. Most of his carriages were not signed and can only be identified by their characteristic A shape. In 1864 Patek Philippe chose him to build their first tourbillon regulator.