The Citizen Eco-Drive Promaster Nighthawk (Model BJ7137-07E) is a pilot-style men's watch featuring a 42mm stainless steel case with black dial and black leather strap. Designed to evoke the aesthetic of a cockpit at night, this aviation-inspired timepiece combines functional features with sophisticated styling.

The watch is powered by Citizen's Eco-Drive technology (Caliber B877), which converts any light into energy, eliminating the need for battery changes. Key features include dual time zone capability for tracking two time zones simultaneously, slide rule bezel for aviation calculations, date display at 3 o'clock, chronograph functionality, and luminous hands and markers for low-light visibility. The mineral crystal protects the black dial, while the 22mm leather strap features a safety fold-over clasp with push buttons.

Built for reliability and durability, the Nighthawk offers 200 meters (660 feet) water resistance, making it suitable for swimming and recreational diving. The black leather strap is crafted from Leather Working Group certified materials, ensuring environmentally responsible manufacturing practices. Package dimensions are 6.1 x 5.2 x 4.09 inches, weighing 3 ounces.