ETA Swiss self-winding mechanical movement modified by Zannetti. Steel case with a diameter of 51.30 mm, 16 mm thick. Unidirectional rotating steel bezel with black aluminum ring. Helium escape valve. Scratch-resistant sapphire crystal with anti-reflective treatment. Luminescent dot at 12 o'clock. White minute track for measuring the dive span. Crown in black PVD. Hand-engraved black dial. Date window at 3 o'clock. Steel caseback, finely engraved with screw closure. Black rubber strap with original and personalized Zannetti steel pin buckle.