While the flying tourbillon is positioned front and off-center at 6 o’clock, what may first strike the eye is the transparent mainplate. It is decorated with a blue-tinged sapphire bridge that runs across the top half of the dial. Everything about the Imperial Blue is, well, focused around the blue. The inside of the bezel has blue-tinged hour markers, the tourbillon endstone is a blue gemstone, and Ulysse Nardin is written in blue across the bottom of the crystal. The case comes in 18-carat polished white gold and measures in at 46 mm, which, while sized for the brawnier wrist, adds considerable depth to the design.

At 4 o’clock and 8 o’clock, you’ll find two hammers, and upon closer inspection you’ll notice two more tucked underneath them. They are engraved Do, Re, Mi and Sol (C, D, E and G for you tab-readers). The minute repeater chimes to the Westminster melody, a very English and genteel route to take an otherwise active and animated watch. Each hour is marked by the Sol-chime, a function that can be controlled with the pusher at 11 o’clock on the back of the case.

Speaking of the back, it sports a sapphire crystal that showcases the in-house caliber UN-970, a manual-winding movement with approximately 50 hours of power reserve. A singe barrel powers the chime of passing hours as well as the melody. The barrel can be wound either partially, by activating the repeater slide at 9 o’clock, or fully by rotating the crown counterclockwise to the point of resistance. Winding the crown clockwise winds a second barrel that in turn powers the movement.

The Ulysse Nardin Imperial Blue will be limited to 20 pieces, at an estimated price of CHF 750,000 ($830,000). For more information, visit Ulysse Nardin Online.