This is a big watch, for pilots who like the look and feel of something substantial on their wrist. The diameter is 45 mm, and the thickness 14.85 mm. The case is made from stainless steel, and the dial is black with khaki accents. The watch comes with a leather strap and is water resistant to 100 meters. As a nod to its 100-year anniversary, Hamilton is limiting production of the 2018 version to 1,918 pieces.