Rare German coin watch with a miniature movement Circa 1880

Almost, as new coin watch attributed to Friedrich Wilhelm Roetig
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A rare, almost as new German coin pocket watch with a miniature movement, circa 1880.
The two thaler silver coin case is made of blued steel, with on the front: embossing of the Ulm cathedral and inscription: Zur Erinnerung an d. Wiederherstellung d. Münsters in Ulm 1871, 2 Thaler, C. Schnitzspahn F.; and on the back: profile portrait of King Charles of Wuerttemberg and inscription: Karl Koenig von Wuerttemberg, and a gold hinge and shackle. The miniature enamel dial (diameter 2,5 mm) has Arabic numerals and blued hands. And the miniature bridge movement is Keywind.
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Diameter: 49 mm
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Weight: 60 g
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Signed: No name