The Explorer II collection traces its roots back to 1971, when Rolex designed a watch specifically for cave explorers and adventurers operating in total darkness.

The reference 216570 continues that legacy with modern engineering and enhanced usability. Its defining feature—the fixed 24-hour bezel paired with an orange GMT hand—allows wearers to distinguish between day and night, even without natural light.

While originally intended for extreme environments, this functionality has evolved into a practical feature for modern travelers, offering a second time zone at a glance.

One of the most significant updates introduced with the 216570 was its larger 42mm case, a first for the Explorer II line.

This increase in size was more than aesthetic. It brought:

• Improved legibility through a “maxi dial” with larger hour markers
• A stronger wrist presence compared to earlier 40mm references
• Enhanced proportions to accommodate updated hands and movement

Despite the increase, the watch retains the balanced ergonomics Rolex is known for, making it suitable for daily wear.

The Iconic “Polar” Dial

The white dial variant—nicknamed the “Polar” Explorer—has become one of the most recognizable configurations in Rolex’s lineup.

Its appeal lies in contrast and clarity:

• Crisp white background
• Bold black hour markers and hands
• Striking orange 24-hour hand

This high-contrast design ensures exceptional readability, further enhanced by Rolex’s Chromalight lume, which emits a long-lasting blue glow in low light.