A superb professional diving watch, the Mido Ocean Star 600 Chronometer stands out with its bold aesthetic, featuring a deep black dial, a striking dark green ceramic bezel, and a matching original green rubber strap. Equipped with a built-in helium escape valve and an officially certified chronometer movement (COSC), this model is a benchmark for underwater performance and precision timekeeping. Technical Specifications: • Brand: Mido • Model: Ocean Star 600 Chronometer • Reference Number: M026.608.A (Case back marked M026608 B) • Movement: Automatic, COSC-certified Chronometer • Case Material: High-grade stainless steel • Bezel: Green ceramic, unidirectional rotating with push-down safety mechanism • Dial Color: Glossy black with highly luminous hands and markers • Functions: Date display at 3 o'clock, Helium Escape Valve on the side of the case • Crystal: Scratch-resistant sapphire crystal • Water Resistance: 60 bar / 600 meters / 1968 feet • Strap: Original Mido green rubber strap with original signed steel buckle • Case Diameter: approx. 43.5 mm (excluding crown) Condition & Presentation: • Condition: Very good condition. The watch shows minimal and normal signs of wear, barely noticeable when worn. The case, crystal, and ceramic bezel are in excellent shape, exactly as shown in the photos. • Functionality: The movement functions perfectly, keeping precise time according to its chronometer certification. • Included Items: The watch comes with its original inner box only. • Documentation: No papers included. The watch is sold exactly as shown in the photographs. Please review the images carefully, as they are an integral part of the description.