The Richard Mille RM 39-01 Automatic Aviation E6-B is a sophisticated timepiece designed for aviation professionals. It features a fixed and bi-directional rotating bezel, replicating the E6-B slide rule, enabling calculations for fuel consumption, flight times, ground speed, density altitude, and wind influence. The watch is powered by the RMAC2 automatic movement, offering functions such as UTC, countdown, flyback chronograph, oversized date, and month display. Crafted from grade 5 titanium, the case measures 50 mm in diameter and 16.8 mm in thickness, ensuring durability and a lightweight feel. The timepiece is secured with a black rubber strap and is water-resistant up to 50 meters. With a power reserve of approximately 50 hours, the RM 39-01 combines technical precision with a bold aesthetic, making it an essential tool for pilots and aviation enthusiasts.