Austrian tourbillon watch with réaumur thermometer Circa 1840

Gold tourbillon watch with chronometer escapement by Ignaz Ruziczka 
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A fine and rare Austrian gold open faced one minute tourbillon watch with chronometer escapement and réaumur thermometer, circa 1840. Gilded ¾ plate movement, signed by Ignaz Ruziczka in Vienna, features a spring detent chronometer escapement mounted on an unusual crescent shaped carriage with screws around the perimeter. It includes a bi metallic compensation balance with two large curved sliding weights, a blued steel helical spring, and a fusee and chain. The backplate is decoratively engraved with scrolling foliage. The white enamel dial, signed Iz Ruziczka in Vienna, displays Roman numerals, an outer minute ring, subsidiary seconds, and a sector for a Réaumur graduated thermometer marked for Wärme & Kälte, and with spade hands.
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The gold case has an engine turned back and a heavily chased and engraved band featuring flowers and foliage. The pendant and bow are similarly decorated. The case back is marked with INV and 1840 within a cartouche, while the gold cuvette is engraved with movement details and filled with white, light blue, and green opaque enamels.
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Diameter: 56 mm
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Signed: Ignaz Ruziczka, In Wien
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The movement will run for short periods. The surfaces are in good aesthetic condition. Dial with hairline cracks at the very edge of the dial between 1:30 and 3 o’clock, with some further minor scratches. The case is in good overall condition, and the decorative scheme remains clear.
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Ignatz Ruziczka was a respected small scale watchmaker in Vienna who lived in the middle of the 19th century; his products won awards at several trade exhibitions. He received a bronze medal at the trade exhibition in 1845. Ignatz lived in Leopoldstadt, Taborstrasse 320.