Swiss aluminium dress watch with aluminium movement Circa 1951

Aluminium open faced lever pocket watch
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A very fine and rare Swiss, light, aluminium keyless dress watch with aluminium movement, circa 1951. Accompanied by a Vacheron & Constantin box. Made for Aluminium Company of Canada Limited. A polished and brushed case, the back with engraved dedication.
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Matte aluminium dial with applied polished aluminium Breguet numerals, outer minute divisions, guilloche subsidiary seconds. Brushed aluminium Breguet hands. An aluminium movement, Geneva striping decoration, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance adjusted to temperatures, blued steel Breguet balance spring, swan-neck micrometre regulator.
Dial, case and movement signed.
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Diameter: 45 mm
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Signed: Vacheron & Constantin  Genève