The Zenith Defy Classic Open watch, equipped with the legendary El Primero movement, is a masterpiece of engineering that combines luxury and sportiness. Here are the details of its technical specifications based on the advertisement and manufacturer data [1, 8]: Watch Movement: Legendary Movement: The watch operates with the world-renowned El Primero automatic movement, known for its superior accuracy [1, 8]. Open Feature: The open heart dial design at 10 o'clock allows you to clearly see the intricate mechanical movement's beats and wheels as they operate [1, 6]. Frequency and Oscillation: The watch operates at an ultra-high frequency of 36,000 vibrations per hour (5 Hz), giving the second hand an exceptionally smooth and precise sweep.📐 Case & Dial: Case: Made of carefully polished shock-resistant stainless steel [1, 7]. Size: The case has a distinctive and bold diameter, giving it a strong presence on the wrist [1, 8]. Dial: Luxurious black face with prominent geometric patterns, featuring a white sub-dial for seconds or chronograph functions [1, 7].🔗 Strap & Comfort: Material: High-quality black natural rubber strap [1, 7]. Pattern and Comfort: The strap features woven patterns that give it a luxurious sporty look, designed for daily wear and providing complete comfort on the wrist. Features: Water Resistant Material: Stainless Steel Movement Type: Automatic