Since there's basically no design theme to the watches made especially for the Only Watch auctions (previously mentioned), except possibly the color red, Vacheron Constantin decided to go with a MC Escher design. Not quite what I would have chosen, but they executed it meticulously, with a gold dial engraved, enameled and set with an actually tasteful field of diamonds!
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Some closeup shots of the dial. The majority of the birds are done in champleve enamel, with guilloche (engine work) for the un-enameled ones. The one diamond set bird has about 40 diamonds with a total weight of .08ct (yes, those are some TINY stones).
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(pictures from the FIHH )
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I complain about The Ugly, so to be even-handed: that's actually pretty elegant. (In an admittedly geeky way...)