German metal and leather repeating coach clock Circa 1750

Open faced quarter repeating coach clock by Sebastian Baumann
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A heavy, complicated German open faced quarter repeating coach clock, circa 1750. Bell, verge movement, repeating the hours and quarters. Silver champlevé dial with Roman hours and Arabic minutes, presumably original hands. Metal case covered with leather and large sound openings, leather replaced by snake skin to the back. Comes with, presumably, original key. Movement and dial signed.
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Diameter: 115 mm
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Weight: 1.350 g
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Signed: Sebastian Baumann Friedberg
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Sebastian Baumann is first mentioned in Friedberg in 1729. He went to Graz in 1752 and died in 1780. From him is also known a highly complicated travel clock with 4 barrels.