The Citizen Promaster Air GMT NB6045-51H is a robust automatic timepiece designed for aviation enthusiasts. It features a 44.5mm gray ion-plated stainless steel case and bracelet, complemented by a gray dial with luminous hands and markers for enhanced legibility. The watch is powered by the Citizen Caliber 9054 automatic movement, offering a 50-hour power reserve and GMT functionality. Additional features include a date display at the 3 o'clock position, an aeronautical slide-rule bezel operated by the 7 o'clock crown, and water resistance up to 200 meters. Reference number: NB6045-51H.