Austrian automatic winding silver pocket watch Circa 1880

Silver Loehr Perpetual open faced watch
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An Austrian rare pocket watch with automatic winding by oscillating weight pedometer system and power reserve indicator, circa 1880.
Silver case with glazed movement. Signed white enamel dial with radial Roman numerals, auxiliary seconds, power reserve indicator at “3” and flower hands. Oscillating weight wind movement with cylinder escapement, ring balance and blued balance spring.
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Diameter: 48 mm
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Weight: 83 g
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Signed: August Ritter von Loehr, “Perpetual Loehr Patent”, Vienna
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August von Loehr of Vienna took out patents for the safety mechanism in Britain and USA in 1878 and 1879.