O Speedmaster Ref# 310.30.42.50.01.001

O Seamaster Diver 300M – Co-Axial Master Chronometer 42 mm

🔹 Overview
Since its debut in 1993, the O Seamaster Diver 300M has become a symbol of bold elegance and technical mastery. Worn by explorers, professionals, and legends alike, this timepiece redefines the balance of heritage and innovation — beneath the waves and beyond expectations.

💎 Sophisticated Strength in Every Detail

• Case: 42 mm stainless steel — robust yet refined for modern explorers

• Bezel: Blue ceramic with white enamel diving scale — durable and engineered for clarity

• Dial: Sun-brushed ceramic, laser-engraved with O’s signature wave pattern — a tribute to oceanic rhythm

• Hands & Indexes: Rhodium-plated, filled with Super-LumiNova for maximum legibility in darkness

• Helium Escape Valve: Conical design, an O hallmark — symbol of genuine diving DNA

⏱ Precision at Its Core

• Movement: O Co-Axial Master Chronometer Calibre 8800

• Certification: METAS Master Chronometer, resistant to magnetic fields up to 15,000 gauss

• Power Reserve: ~55 hours

• Display: Sapphire crystal caseback showcasing movement

• Water Resistance: 300 m / 1000 ft — trusted for true diving performance

• Bracelet: Integrated stainless steel with diver’s extension for adaptive comfort

✅ Conclusion
The O Seamaster Diver 300M is more than a diving watch — it is a legacy of exploration, fearless innovation, and iconic design. Crafted for the deep, designed to endure, and made to inspire, it embodies precision, resilience, and elegance in every detail.