Unusual Swiss gold and enamel decorated square watch Circa 1910

Gold, platinum and diamond-set lady’s watch
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A fine and unusual Swiss, large, square, enamel decorated and engraved 18K yellow gold keyless pocket watch, circa 1910. A square case, 18K yellow gold, bezel and bow engraved with angled leaves, the case back decorated with blue and white enamel on an engine-turned ground, rounded corners. Champagne dial with black Breguet numerals, outer minute track, subsidiary seconds, with an engraved square floral motif. Blue steel Breguet hands. Straight-line lever escapement, cut bimetallic compensation balance adjusted to 2 positions, blued steel Breguet balance spring, index regulator. Dial, case, and movement signed.
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Dimensions: 42 x 42 mm
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Signed: Ebel  Swiss
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The case is slightly scratched.