Extremely unusual Swiss silver with two escapements Circa 1870

Silver watch with lever and cylinder escapement
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A fine and extremely unusual Swiss, twin barrel, two independent train silver pocket watch, circa 1870. This is a watch with two escapements, a lever escapement and a built in working model of a cylinder escapement. A polished, glazed back casing. Silver dial, polished chapter ring with radial Roman numerals, outer minute divisions, engine-turned centre. Blued steel Breguet hands.
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A polished gilt movement, two going barrels placed back to back and wound in unison, 16 jewels, some in screwed gold chatons, two wheel trains, counterpoised lever escapement with cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, additional cylinder escapement not geared to the centre wheel, with three arm balance, blued steel flat balance spring, index regulator.
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Diameter: 54 mm
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Signed: No Name
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This watch was very likely made in one of the Swiss Ecoles d’Horlogerie as an exhibition piece to demonstrate both the lever and the cylinder escapement. The style of the plates was probably inspired by Jürgensen. The watch has two spring barrels placed back to back with an interconnecting arbour so that both are wound at the same time, the lever escapement is the main escapement and actually operates with the going train. The cylinder escapement is driven by the rear barrel via a further train beneath the dial plate but has no operational function. This watch is in effect a lever watch incorporating a working model of a cylinder escapement.