Automatic mechanical movement Sellita Calibre SW221-1 with 26 Jewels and 28800 vph. Approximate power reserve: 38 hours. Stainless steel case in black finish. Yellow rubber strap, deployment clasp. Black stainless steel unidirectional rotating bezel around the black dial. Dial features black hour and minute hands, Arabic numeral markers, minute marks on outer rim, and luminous coating for enhanced visibility at night. Analog dial type with date display positioned at 3 o'clock. Scratch resistant sapphire crystal lens protecting the face. Screw-down winding/screw tip system. Transparent case back allowing view of the movement. Round shape measuring approximately 43.5 mm in diameter and 13 mm thick. Band width: 22 mm, length adjustable up to about 8 inches (depending on wrist size). Water resistant against depths up to 100 meters or 330 feet. Functions include date display, hour, minute, second indications. Category: Casual watch style. Label: Swiss Made. Product series: Air Speed.