Seiko Prospex King Sumo Blue ‘Gradation’ Diver SPB321J1

This watch shape is affectionately named ‘Sumo’ by Seiko fans because of its size and shape and the 12 o’clock marker – it’s a substantially strong-looking timepiece. This latest design has been updated with new modern features, including a ceramic bezel and super hard coating on the case and bracelet for durability. A new 3-row bracelet has been specifically made for this model, while the clasp has also been modernised. The dial features a fine pressed pattern dial with gradations of blue