Limited Edition of 500 pieces, A Chronograph - Fitted with the "Slide Rule" aka "Navigation Computer" which allows to compute different airborne calculations such as fuel consumption, climbing times & converting miles into nautical miles or kilometers, 15.4mm thickness, silver dial, scratch resistant sapphire crystal, bi-directional rotating bezel, solid case back, deployant buckle clasp, automatic movement, brown alligator/crocodile leather strap, water resistant to 50m/165ft.