The Hawker Harrier "Jump Jet," which flew for both the US Air Force and the Royal Air Force in the latter half of the 20th century, may have sparked as much controversy, excitement, and technological wonder as any fighter plane. The spectacular aircraft, which is propelled by the renowned Rolls Royce Pegasus engine family, serves as the visual backdrop for the Hawker Harrier II Dual Retrograde Chronograph watches.