Swiss gold chronometer with one minute tourbillon Circa 1865

Chronometer with one minute tourbillon regulator Type 2 by Ernest Guinand 
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An extremely fine and very rare Swiss 18 carat gold open faced pocket chronometer with one minute tourbillon regulator Type 2 by Ernest Guinand, circa 1865. Made for Victor Siegfried, Strasbourg. Nickel plated movement, Geneva Striping and triangular decoration, wolf’s tooth winding wheels, gold wheel train, Guinand 2 type carriage (Meis classification) with pivoted detent chronometer escapement, gold escape wheel, cut bimetallic compensation balance with gold screws, Breguet blued steel balance spring with perpendicular stud for preventing excessive amplitudes and double overcoil, index regulator with gold scale plate, the entire train jeweled. Glazed gold rimmed cuvette. White enamel dial with Roman numerals, outer minute track, large subsidiary seconds, original gold and rose diamond set Ulysse Breting type hands. Engine turned case back with polished border, the inside inscribed Rudolf Filzwieser, Wien, with an engraved basket of flowers, polished curved bezel, reeded band, massive bow, hand setting slide in the band. Dial and movement signed by the retailer, dial 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: Ulysse Breting Le Locle
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Ernest Guinand (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.