Rare Italian watch with retrograde minute indication Circa 1880

Silver open faced pocket watch by Robert Kohlschitter
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An extremely rare Italian gentleman’s pocket watch with jumping hour and retrograde minute indication, circa 1880.
Silver engine turned case. Enamel dial with aperture for retrograde minute indication with Arabic numerals, engine turned silver mask and 12 filigree hands. Bridge movement, keywind, frosted, gilt, large barrel, cylinder escapement, screw compensation balance, blued balance spring.
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Diameter: 49 mm
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Weight: 141 g
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Signed: Rob. Kohlschitter
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Roberto Kohlschitter Roberto Pietro Kohlschitter was born in Monza in 1866. He was hired by the “Ufficio Idrografico” – the Italian Hydrographic Institute ‘ in December 1885. In 1910 Kohlschitter received a silver medal for his “services to nautical sciences”. He was still working in 1923. It is not known if Roberto was in any way related to the manufacturer of chronometers and precision instruments in Milan, Giuseppe Kohlschitter.