Citizen Promaster Marine "Fujitsubo" NB6021-17E

Citizen Promaster Marine NB6021-17E reimagines the 1977 Challenge Diver as a modern, ISO 6425 compliant tool watch. Crafted in Super Titanium with a Duratect TIC finish, it remains exceptionally lightweight and scratch-resistant, ideal for daily wear and underwater use. The 41mm case houses Caliber 9051 automatic movement with a 42-hour power reserve and 16,000 A/m magnetic resistance, keeping time precise amid modern electronics. A unidirectional rotating bezel, screw-down crown, and 200m water resistance (Diver’s) ensure reliability from desk to deep. The black dial with embossed hands and retro green lume ensures legibility in all conditions. The sapphire crystal with anti-reflective coating and a black polyurethane strap with folding clasp finalize a refined, durable design for the discerning men's watch enthusiast.