Seiko SNZB23J2 Seiko 5 Collection. 23 Jewels Self-winding automatic movement. Stainless steel case. Black Rubber Strap. Black Dial with silver tone hands and hour markers. Luminous hands and markers. Lustrous Polished Black Rotating bezel. Day and date display. See through case-back. Water resistant to 100m. Scratch resistant Hardlex crystal. Case measures 40mm diameter by 13mm thick.