Automatic mechanical movement, Calibre El Primero 3600 with column wheel mechanism and Pese de Cercis (swiss lever escapement). 35 jewel composition from 311 parts achieving a frequency of 36,000 vph. Features small second function for independent sweep second hand reading alongside chronograph functions including 60-second, 60-minute sub-dials and running seconds counter. Powered by an automatic movement with approximately 60 hours power reserve when fully wound down. White dial features luminous coated hour markers and baton indexes along with silver-tone hands designed to glow in the dark for enhanced legibility during low-light conditions. Includes a fixed black ceramic bezel, scratch-resistant sapphire crystal glass face, round stainless steel case measuring 41 mm diameter by 13.6 mm thickness. Equipped with a blue cordura rubber strap secured via push-button deployant buckle clasp mechanism. Analog dial type displaying hours and minutes clearly. Date function located between the 4 and 5 o'clock positions. Water resistant to 100 meters / 330 feet depth making it suitable for recreational diving activities.