The exceptional Greubel Forsey Double Tourbillon 30° Technique in platinum —also available in red gold or white gold— is another one of the inventions from this manufacture. This timepiece measuring 47.50mm in diameter full of intricate details and a perfect example of ultra 'haute horlogerie' is not only worthy of a detailed review, but also worthy of admiration. This is a watch where the eye is drawn from one gear to the next, enabling careful observation of each separate element.