Swiss rare silver deck observation chronometer Circa 1990

Open faced deck chronometer watch by Cortébert
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A rare Swiss deck observation chronometer – special series consisting of 20 pieces – with original case, circa 1990.
Silver case, glazed on both sides. Silvered signed dial with radial Roman hours, auxiliary seconds and blued spade hands. Bridge movement, frosted, gilt, with large Glucydur screw balance and incabloc shock protection for balance.
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Diameter: 57 mm
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Weight: 135 g
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Signed: Cortébert “Chronometre”