Automatic mechanical chronometer movement with column wheel. Stainless steel case and black alligator leather strap secured by a deployment clasp. Silver-toned dial features luminous silver-tone hands, luminous index hour markers, minute markers, and navigation computer (slide rule) markings around the outer rim for fuel calculations, climbing times, or mile-to-nautical/kilometer conversions. Analog display includes date window between 4 and 5 o'clock positions. Chronograph sub-dials: black dials displaying 60-second, 30-minute, and 12-hour functions. Screw-down bezel with bidirectional rotation. Scratch-resistant sapphire crystal lens. Solid case back. Round case shape measuring 45 mm in diameter and 15.73 mm thick. Band width options: 24mm or 20mm (likely refers to the strap size available). Water resistant up to 100 feet / 30 meters depth. Swiss Made label.
