Swiss gilt brass watch in the shape of a diamond Circa 1630

Rock crystal verge neck watch
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An extremely rare, rock crystal watch in the shape of a diamond, circa 1630-1640. Gilt brass case, rock crystal on all sides to fold out, faceted. Gilt brass dial, brass full plate movement, verge escapement, applied floral decorations, gut/fusee, blued screws, three-arm brass balance. The dial is decorated with florrely scenes and Roman numerals. The movement and the gilt balance cock are also ornamented.
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Signed:  No Name
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Probably Swiss
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Hand not original