Rare German silver open faced verge pocket watch Circa 1722

Silver early pocket watch by B.H. Kuhlmann
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An early and rare German silver open faced verge pocket watch, circa 1722-1723. The key wound, florally engraved full plate movement with a verge escapement. Silver champlevé dial with Roman hours, half hour markers, an outer minute track, outermost Arabic five minute numerals, an engraved center and gold hands. The polished case with maker’s mark PR. Dial signed, movement numbered.
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Diameter: 50 mm
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Weight: 106 g
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Signed: Bernard Hinrich Kuhlmann Detmold
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Bernard Hinrich Kuhlmann or Bernhard Kuhlmann was born in Osnabrück. He worked as a court watchmaker in Germany from April 20th, 1717. Kuhlmann worked in Cologne
from around 1722-1723.