Citizen Promaster Air Automatic Watch 40mm with Sunray Blue Dial - NK0040-58L
- 60-Hour Power Reserve
- Automatic Caliber 8310
- Date Indicator At 3 O'clock
- 200 Meters Of Water Resistance
- Anti-Reflective Sapphire Crystal
- Silver-Tone Super Titanium Bracelet
- Hack Feature
- Blue Sunray Dial Finish
Citizen NK0040-58L Promaster Air Automatic Watch 40mm with Sunray Blue Dial
The Citizen NK0040-58L Promaster Air automatic mechanical wristwatch combines practical flight instrumentation with Caliber 8310, a 60-hour power reserve and a silver-tone Super Titanium case. An outer slide-rule bezel reinforces its aviation focus, while the sunray blue dial pairs applied indices with red accents. An anti-reflective sapphire crystal covers the three-hand display with date, and 200-meter water resistance supports swimming, showering and snorkeling. A Super Titanium bracelet with a fold over clasp and hidden push buttons completes the design.
Key Features
Super Titanium Aviation Design
Engineered for aviation, the design brings together mechanical watchmaking and an outer slide-rule bezel for practical flight instrumentation. The 40mm silver-tone Super Titanium case is paired with a bracelet in the same material, while a fold over clasp with hidden push buttons fastens it around your wrist.
Automatic Caliber 8310 And 60-Hour Power Reserve
Powered by the release of a wound spring, the mechanical movement never requires a battery. Its oscillating weight winds the spring with the motion of your arm, connecting everyday wear to the watch's operation. The power reserve lets the movement keep running for up to 60 hours between winding.
Sunray Blue Dial And Anti-Reflective Sapphire
Applied indices and red accents give the blue dial its distinctive visual detail, while a three-hand layout and date keep everyday information together. Above it, the sapphire crystal resists impact and shattering, and its anti-reflective coating deflects light to help maintain a clear view.
200-Meter Water Resistance
Water-ready capability extends beyond the watch's aviation role. With a WR200/20Bar rating, it can accompany you into the pool for a swim, into the shower or out snorkeling, bringing its mechanical timekeeping to more than dry-land activities.
Features
- Outer Slide-Rule Bezel
Adds an aviation instrument to the watch's exterior. - 40mm Super Titanium Case
Frames the dial in a silver-tone finish. - Super Titanium Bracelet
Fastens with a fold over clasp featuring hidden push buttons. - Caliber 8310 Automatic Movement
Arm motion supplies winding power without a battery. - 60-Hour Power Reserve
Stores energy for time away from your wrist. - 3 Hand With Date And Hack Feature
Combines time and date display with a hack function in the movement. - Sunray Blue Dial
Brings applied indices and red accents into the display. - Anti-Reflective Sapphire Crystal
Provides impact and shatter resistance with a light-deflecting coating. - WR200/20Bar Water Resistance
Accommodates swimming, showering and snorkeling.
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Frequently Asked Questions
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The mechanical movement winds with the motion of your wrist and does not require a battery. It offers a 60-hour power reserve when fully wound.
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Yes. With water resistance up to 200 meters, it is suitable for swimming, showering, and snorkeling. Ensure the crown is fully secured before exposure to water.
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The case and bracelet are made of Super Titanium, a lightweight, durable material with a silver-tone finish.
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Yes. The analog display includes a date indicator at the 3 o'clock position.
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The outer slide-rule bezel is an aviation-inspired instrument that can be used for manual calculations when paired with the appropriate scale and reference.
