Soar to new heights with Citizen Eco-Drive Nighthawk, a flight watch for both novice and professional pilots. Nighthawk features a pilot’s slide rule dial ring operated by a crown at the 8 o’clock position, dual time, date, non-reflective crystal and large luminous markers and hands for easy readability. Stainless steel with 42mm screw-back case. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B877.