A dynamic 39.5 mm Chronomaster Open in brushed and polished stainless steel, revealing the beating heart of the El Primero 3604 calibre through a matte silver open-heart dial with tricolour chronograph counters. The elegant case pairs classic aesthetics with mechanical intrigue, creating a compelling modern chronograph. The high-frequency El Primero 3604 automatic chronograph movement powers a central 1/10th-of-a-second hand (rotating every 10 seconds), features column-wheel actuation, and delivers a 60-hour power reserve—covered by COSC chronometer certification. Housed under sapphire crystals front and back with a screw-down, display caseback, the watch offers 100 m water resistance and is worn on a blue textile or rubber strap secured via a deployant clasp—balancing sporty flair with refined craftsmanship.