Formex: Reef 39.5mm "Baby" Automatic COSC 300M - Green

The Formex Reef 39.5 mm Automatic Chronometer COSC 300M is a Swiss dive watch combining elegant design with high-level technical performance. Its modular design allows for easy personalization, notably thanks to bezels and straps that can be interchanged without tools.​

Technical Specifications

• Case: 316L stainless steel with satin and polished finishes, 39.5 mm diameter, 11 mm thickness, 45.5 mm length (lug-to-lug). ​

• Bezel: Unidirectional Zirconium Oxide ceramic, available in several colors, easily interchangeable without tools. ​

• Crystal: Sapphire with anti-reflective coating, offering optimal readability and increased scratch resistance.​

• Dial: Green with sunray finish, applied indices, and luminescent hands filled with Super-LumiNova BGW9 for optimal visibility in the dark. ​

• Movement: Swiss automatic Sellita SW300-1 caliber, COSC-certified chronometer, offering a 56-hour power reserve. ​

• Water Resistance: 300 meters (30 ATM), suitable for professional diving.​

• Bracelet: Stainless steel with patented micro-adjustment system, or rubber and leather options, all equipped with a tool-free quick-change system. ​

• Case Back: Screw-down, ensuring optimal water resistance.​

Why choose this watch?

The Formex Reef 39.5 mm Automatic Chronometer COSC 300M is ideal for dive watch enthusiasts looking for a combination of Swiss precision, robustness, and personalization. Its refined design and technical features make it a perfect choice for daily wear or your underwater adventures.