In the creative process U-Boat watches takes inspiration from the 1938 Doppiotempo model, originally designed for the Italian armys parachute assault regiment, the Col Moschin. A famous design thanks to the case featuring two crowns, one for setting the time and date, the other for adjusting the "doppiotempo" or dual time function, and the iconic rotating internal bezel that allows the second time zone setting. These characteristics are combined by the Lucca designer with those of the acclaimed Capsoil, an innovative watch that launched the concept of Oil Immersion, characterized by the mechanism completely immersed in an oil bath that amplifies the three dimensional effect. A fluid that creates the illusion of absence of the glass, also thanks to the compensation bubble floating freely on the dial and compensating the temperature variations.