German repeating coach clock with self-strike and alarm Circa 1700

Silver open faced quarter repeater
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A German silver open faced quarter repeating hour and quarter-hour self-striking coach clock with alarm, circa 1700. Gilt full plate movement, chain and fusee, cylinder escapement, two barrels, three hammers, three-arm brass balance, engraved and pierced balance cock. White enamel dial with Roman hours and Arabic five-minute numerals. The case is richly florally pierced and engraved, rear bell. Dial and movement signed.
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Diameter: 107 mm
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Weight: 950 g
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Signed: J.G. Zoellner in Oschatz
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This timepiece seems to have undergone a sophisticated update. While it was originally fitted with a verge escapement, the contact of the new cylinder escapement is now controlled by a lever system that is adjusted by a screw.