Vacheron Constantin - Métiers d’Art Copernicus Celestial Spheres 2460 RT

Three beautifully and differently rendered versions of the same concept. I think you are supposed to collect the whole set.

Hand Engraved (7600U-000G-B211)

Grand Feu Enamel (7600U-000G-B212)

Engraved and Painted Sapphire (7600U-000G-B226)

Calibre 2460 RT

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Watch Collecting Lifestyle's hands-on review (with live pics)

Deployant's review (with original pics)

Hodinkee's review