Heavy Swiss platinum and gold Zodiac dress watch Circa 1904

Platinum watch with gold signs of the zodiac
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A very fine and rare Swiss, very heavy, platinum and gold, keyless Zodiac dress watch, circa 1904. Retailed by Boucheron, Paris. A solid platinum case, the bezel applied with gold signs of the zodiac, the back applied with six gold relief figures of the Maenads and Pan playing the pipe, central lyre.  Frosted platinum dial with applied gold radial Roman numerals, applied gold outer dot minute divisions. Gold spade hands.
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A matte gilt movement, 17 jewels, wolf’s tooth winding, straight-line lever escapement, cut bimetallic compensation balance with gold temperature and meantime adjustment screws, blued steel Breguet balance spring with overcoil, patent screw micrometre regulator. Movement signed Vacheron & Constantin, the interior of the case signed Boucheron, Paris. Weight of case excluding the movement 92 grams.
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Diameter: 50 mm
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Signed: Vacheron & Constantin  Genève ( retailed by Boucheron Paris)
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The case is slightly scratched.
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This very fine dress watch has a very heavy platinum case (3.24 ounces) with applied relief gold figures in the ancient Greek style. This is one of two known designs in the series, another very similar watch with a different scene of Pan on the back is illustrated in The World of Vacheron & Constantin?, Lambelet & Coen, 1992, p. 306.