Swiss chronograph with compass and tachymeter Circa 1920

Nickel chronograph with compass and tachymeter
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An extremely rare, large and heavy Swiss nickel chronograph with compass, tachymeter and counter, circa 1920. Swiss 4/5 plate movement, frosted and guild, Glucydur screw balance, polished and blued screws, matt finished chronograph steel parts. White enamel dial with tachymeter scale in black, blue and red digits, chronograph register, separate small second, vertical dial rind with 2x 12h, Roman and Arabic numerals for day/night division, outer dial division with 360 degree graduations for the compass, gold spade hands, on the outer division the silver plate is partially oxidized. Plain case. Cuvette signed.
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Diameter: 69 mm
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Weight: 243 g
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Signed: Montre Boussole du Captaine Vincent