The Seiko King Seiko SPB457J1 is a mechanical watch featuring the Caliber 6R51 movement, offering a 72-hour power reserve and an accuracy of +25 to -15 seconds per day. The stainless steel case measures 36.1mm in diameter and 11.6mm in thickness, with a box-shaped sapphire crystal that has an anti-reflective coating on the inner surface. The light blue dial is complemented by Lumibrite on the hands and indices for enhanced visibility. The watch is water-resistant up to 10 bar and comes with a stainless steel bracelet equipped with a deployment clasp featuring a push-button release. The bracelet includes a double-lever system for easy interchangeability without tools. The SPB457J1 also features a screw case back and a stop second hand function.