Citizen Watch Promaster Air Geo Trekker BY3006-53H. Touch the edge of the sky with the new Promaster. A bold 46mm stainless steel case in silver-tone centers the design, with the professional-grade pilot's watch mission-ready on the wrist C fully equipped with a bold set of chronograph pushers, 5-link stainless steel bracelet, and an outer slide rule bezel. Underneath a scratch-resistant sapphire crystal, the watch's data-driven display is on view, with white and silver-tone accents working against a dark background for a rapid legibility for the wearer. Towards the 6 o'clock position, a northern hemisphere disc rotates counter clockwise, with the detail showcasing the world time with a map inspired design. Other standard and advanced functions of the watch include running hours and minutes, date indication, power reserve indication, world time, and a slide rule bezel function. This distinctive sports watch utilises Citizen's Eco-Drive technology thats sustainably powered by any light and never needs a battery. Water resistant up to 200 metres.