German silver historically interesting open faced watch Circa 1850

Silver Glashütte pocket watch 
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An early and historically interesting silver open faced Glashütte verge pocket watch made by Friedrich Gutkaes in Dresden, circa 1850. ½ Plate movement with a steel lever, slightly larger lever fork, gold escapement wheel and screw compensation balance. White enamel dial with Roman hours, an outer minute track, subsidiary seconds at 6 o’clock and blued spade hands. Engine turned case back and polished bezels. Case numbered, movement signed.
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Diameter: 46 mm
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Weight: 63 g
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Signed: F. Gutkaes Dresden
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The present timepiece dates from the early days of the watch industry in Glashütte. The plate has a shape typical of the time and was used in various movement designs.