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 tiered case with glazed movement. Signed white enamel dial with radial Roman numerals, auxiliary seconds, power reserve indicator at “2” and blued flower hands. Oscillating weight wind movement, frosted, gilt, with ring balance and blued balance spring.
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Diameter: 46 mm
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Weight: 82 g
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Signed: Perpetual Loehr Patent
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August von Loehr of Vienna took out patents for the safety mechanism in Britain and USA in 1878 and 1879.