Silver German keywind cylinder pocket watch Circa 1800

Silver cylinder pocket watch
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A south German pocket watch with a four hour dial in the manner of Benjamin Franklin, Attributed to the Hahn brothers, circa 1800.
A silver case, enamel dial, full plate movement, keywind, chain/fusee, open barrel, cylinder escapement, five-arm brass balance.
The watch has a Franklin dial but the so called wandering hour hand as we know it from Roentgen & Kinzing, for example, is missing.
It takes four hours for one 360° revolution of the single hand. The watch is obviously in an experimental state – possibly this was an attempt to copy a Franklin clock, which, however, failed at the implementation of the hand mechanism.
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Diameter: 54 mm
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Weight: 107 g
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Signed: No Name