SKU Code: TN6/BD/12 

MWC NATO Chronograph – Stainless Steel (Ronda 5040.D Movement)

A Rugged Professional Chronograph with Dual Time Zone Tracking and 200m Water Resistance

Built for the aviation applications and tough enough for any terrain, the MWC NATO chronograph in stainless steel was developed to meet the demanding needs of military aircrews, commercial pilots, and general aviation professionals. While based on the proven specifications used by other NATO chronograph manufacturers, this model brings several smart upgrades that improve functionality, legibility, and real-world practicality.

At the heart of the watch is a high-performance Swiss Ronda 5040.D movement, delivering precise chronograph operation with zero-complication ease. The case measures 45.5mm including the crown, striking a balance between bold presence and wearable proportions.

Dual Time Zone Tracking – No Extra Hand Required

With more and more of our customers needing to track two time zones—whether for international operations, travel, or coordination across regions—we’ve opted for a simplified solution over a traditional GMT hand.

Instead of adding mechanical complexity, we’ve included a 12-hour bezel, allowing effortless time zone offset tracking. This bezel, unlike the more common dive-style “count-up” design, lets you read a second time zone at a glance:

Example:
If you're in Paris and need to track Miami time (6 hours behind), simply rotate the bezel so the 9 o’clock marker aligns with the 3 on the dial. Just like that, you’ve got two time zones on your wrist—no apps, no math, no fuss.

This feature is especially useful now that most divers rely on computers underwater, making the traditional dive bezel less essential. Here, it becomes a highly functional tool for everyday, multi-zone use—without compromising the watch's 200m/660ft water resistance or its classic diver-inspired style.

Ronda 5040.D Sub-Dial Functions:

Left Sub-Dial (9 o'clock):

• 30-minute counter: This counter is a subdial located at the 9 o'clock position on the watch face and records up to 30 minutes of elapsed time for the chronograph function.

Bottom Sub-Dial (6 o’clock):

Dual-Function 1/10-Second & 12-Hour Chronograph Counter

For the first 30 seconds after the chronograph is started, this dial functions as a 1/10-second counter, providing high-precision measurement. Once 30 minutes have elapsed, the same sub-dial switches to an hour counter, tracking up to 12 hours of total time.

Right Sub-Dial (3 o'clock):

• Small seconds (continuous running seconds for the main time)
• This one’s always running — has nothing to do with the chronograph function.

🕹️ Chronograph Controls:

• Top pusher (Start/Stop): Starts and stops the chrono.
• Bottom pusher (Reset): Resets the chronograph hands to zero (after it’s stopped).

📝 Pro Tip:

If the chrono hands are out of alignment (say, the 1/10th sec hand isn't zeroing properly), you can recalibrate them via the crown pulled out to the second position — each pusher moves a different hand. This means that whereas with many chronographs they need to be booked into a watchmaker to make minor adjustments. This does not apply in the case of this particular model because it is a simple job to find the calibration yourself if it's ever required.

Key Specifications

• Movement: Swiss Ronda 5040.D
• Battery: Renata 395
• Battery Life: Approx. 54 months
• Case Material: 316L stainless steel
• Case Diameter: 44mm (excluding crown), 45.5mm (including crown)
• Lug-to-Lug: 49mm
• Thickness: 13.5mm
• Crown: Screw-down locking crown
• Crystal: Sapphire with anti-reflective coating
• Water Resistance: 20 ATM / 200m / 660ft
• Dial: Matte black with Super Luminova for maximum visibility in low light
• Strap Bars: Shoulderless Spring
• Straps: Supplied with both black and grey 20mm NATO nylon webbing straps

Why Sapphire?

The crystal is one of the most vulnerable parts of any watch—especially in demanding environments. That’s why we’ve equipped this model with a sapphire crystal, known for its exceptional scratch resistance and shatter strength.

In fact, over 90% of cracked crystal incidents we see involve mineral glass. Even hardened mineral simply doesn’t compare. Our sapphire crystals are strengthened through heat treatment to remove stress and double-coated with anti-reflective layers for clear visibility in bright light or at night.

This makes the watch ideal for military and security personnel, police, outdoor adventurers, and anyone who demands real-world reliability. Over 70% of our customers fall into one of these groups, and sapphire crystal is a must for their line of work.

The Bottom Line

The MWC NATO chronograph in stainless steel fuses military-grade durability with modern functionality—making it a versatile and robust timepiece ready for anything. Whether you're piloting, on duty, traveling between time zones, or simply want a watch that does more without overcomplicating things, this chronograph delivers—every time.