Rare Swiss silver glazed ‘mysterieus’ pocket watch Circa 1889

Mysterieus watch by Armand Schwob Frères
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A very rare, ‘mysterieus’ Swiss silver glazed pocket watch, circa 1889. Plain case, glazed on both sides, so that you can look through the watch without seeing a movement, the hands driven by rotating discs, movement directly under the crown in the hidden area.
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Diameter: 54 mm
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Weight: 91 g
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Signed: Armand Schwob Frères La Chaux-De-Fonds