The Professional collection is renowned for its innovative designs tailored for aviation purposes. The Aerospace, introduced in 1985, featured a streamlined titanium case, dual analogue and digital displays, and a user-friendly control system operated through a single crown. This design balances robustness with lightness, making it ideal for aviation professionals. It also boasts features such as a second timezone, a 1/100th of a second chronograph, an alarm, and a backlighting display, all cohesively managed through its crown.