Early southern German fire gilt copper coach clock Circa 1580

Important coach clock with self strike and experimental regulating device
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An important German, one handed, coach clock with hour self strike and experimental regulating device from southern German origin, circa 1580. Front and back slightly convex, the case band with sound openings and engraved Mauresques, bombé shaped, which is a typical style of the last quarter of the 16th century.
Full plate movement with remains of fire gilding, maker’s mark, 2 open barrels, 1 hammer, iron train, verge escapement, locking plate with internal teeth, stack freed to even out the changing torque of the mainspring, new contact mechanism with experimental lever system and foliot.
Fire gilted copper dial with Roman hours engraved near the edge of the dial, Arabic numerals for the 24 hours display sit closer to the centre, the centre itself exquisitely engraved with a compass rose, precision cut blued iron hand. Fire gilted copper case, finely decorated with hand engraved Mauresques to the back, rear bell.
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Diameter: 84 mm
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Weight: 507 g
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Signed: No name
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The maker’s stamp on the movement plate cannot be fully identified. A crowned wheel is visible, which could be the inspection mark of the city of Mainz, flanked by the letters “N” and presumably “L” or “G”.
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A similar system for operating the contact of the crown wheel with the foliot was used in a German Renaissance pocket watch that is owned by the Kunsthistorisches Museum in Vienna (Museum of Art History). It is illustrated and described in “L’Arte dell’orologeria in Europa” by Guiseppe Brusa, Bramante Editrice, Milan 1978, illustrations 138/139.