German one handed Renaissance clock watch Circa 1575

Fire gilt brass verge clock watch, presumably from Augsburg
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A German one-handed pre balance Renaissance clock watch of museum quality with hour self-strike, wheel balance and stack freed, circa 1575. Iron full plate movement with punched Master’s mark MK, iron train, two open barrels, stack freed, verge escapement, one hammer, block-shaped movement pillars, locking plate with internal teeth for hour striking train, and foliot and hog’s bristle. Brass, fire gilt case, with rich openwork floral chasing and engraving, decorated with flowers, foliage, fruit, animal motifs, mascarons and caryatids; the top with spoke-shaped openwork detail showing the hours. Brass and copper dial, inlaid radial Roman hours on the silver chapter ring, floral engravings on the central brass disc, and finely cut single iron hand.
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Diameter: 60 mm
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Weight: 227 g
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Signed: MK
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Numerous other high-quality watches with the Master’s mark “MK” are mentioned in: “Meister der Uhrmacherkunst” by Juergen Abeler, 2nd edition, Wuppertal 2010, p. 644. The initials “MK” have been attributed to several Renaissance masters such as Michael Klenck, Matthias Kessborer or Melchior Kleinhemmel; however, they cannot be attributed with absolute certainty. What the objects in question all have in common is a very high standard of quality in their artistic and technical execution.
Two similar pieces marked “HK” and “AS” with cases that have, without doubt, been produced by the same maker are illustrated in “Die Deutsche Räderuhr” by Klaus Maurice, Vol. II, Munich 1976, illustrations 436/437.