Citizen Promaster Sky AT8300-58E Men's Watch Black • Sapphire Crystal • Radio-Controlled Eco-Drive

The Citizen Promaster Sky AT8300-58E is a highly functional pilot's watch for men, combining cutting-edge technology in a compact 41 mm case. The silver-tone stainless steel case, measuring 11.62 mm in thickness, houses the in-house Eco-Drive calibre H800 — a light-powered, radio-controlled movement that receives time signals from atomic clocks worldwide (EUR, JPY, USA, China) and maintains an accuracy of ±15 seconds per month without a signal. Thanks to Eco-Drive technology, battery replacement is never required.

The black dial with clean baton indices is protected by a scratch-resistant, anti-reflective sapphire crystal. The watch features an internal slide rule for flight-related calculations such as fuel consumption and tank capacity, operated via a second crown at the 8 o'clock position. Additional functions include a chronograph (up to 60 minutes, 1/20-second precision), world time for 26 cities, perpetual calendar, 24-hour display and power reserve indicator. The solid stainless steel bracelet with a secure double push-button deployant clasp and water resistance to 20 bar make this watch a reliable everyday companion.

Key Features of the Citizen AT8300-58E Watch

• Radio-Controlled Eco-Drive Calibre H800: Light-powered movement with worldwide radio reception and a power reserve of 180 days
• Anti-Reflective Sapphire Crystal: Scratch-resistant protection with anti-reflective coating for optimal legibility
• Comprehensive Pilot Functions: Internal slide rule, chronograph, world time for 26 cities and perpetual calendar in a 41 mm case

Care Instructions for Wristwatches

Care & Cleaning

• Daily: Wipe case and bracelet with a soft, dry cloth to remove dirt and perspiration.
• Water-resistant watches: Clean with mild soapy water and a soft brush, rinse, dry thoroughly.
  Important: Screw the crown down firmly beforehand!!!
• Not water-resistant: Clean only dry or slightly damp, do not use water or cleaning agents.
• Avoid: Harsh chemicals, perfume, cosmetics and heat.
• Leather straps: Do not soak, clean only slightly damp and allow to dry away from heat.
• Water resistance: Do not wear in the shower or bath, have it tested annually.
• Battery (quartz): Have a depleted battery replaced immediately.
• Mechanical watches: Service by a master watchmaker every 5 years.

Storage & Handling

• Store the watch separately, not in direct contact with other jewellery (risk of scratching).
• Place mechanical watches on a flat surface when winding, do not leave the crown pulled out.