The Star Legacy Metamorphosis Limited Edition 8 from Montblanc, a watch that can literally transform itself by revealing two different dials, comes in an eye-catching shade of blue. This is thanks to an extremely complex movement based on the hand-made MB M67.60 calibre. The mechanism is activated by a sliding lever positioned on the side of the white gold case (similar to the lever of a minute repeater mechanism) and connected to a dial. It includes a fixed part and sliding wings that can be opened or closed depending on the desired dial. When the sliding wings are closed, the watch dial shows the universal time function at 6 o'clock in the form of a rotating convex northern hemisphere, surrounded by a 24-hour scale and a day/night indication. At 12 o'clock, the rhodium-plated balance with its blued balance-spring and 18 screws beats at the traditional frequency of 18,000 oscillations per hour. When the sliding wings are open, the dial reveals Montblanc's patented one-minute Exo Tourbillon, which is held in place by a sapphire crystal bridge and represents the sun at 12 o'clock. What makes this possible is the structure of the complication, which allows the balance to be positioned outside the cage and below the sliding wings. Surrounding the Exo Tourbillon is a date disc that moves in jerks. At 6 o'clock, against a background of aventurine, a three-dimensional moon showing its exact position in the sky as seen from Earth rotates constantly around the globe with a gyroscopic effect, just as if it were circling the Earth. The astronomical moon phase complication is of the highest precision and requires only one adjustment every 122 years. Moreover, all the functions driven by this high-level mechanism continue to function regardless of the dial chosen.
