Seiko Prospex SPB101J1 Sumo Automatic Diver's Watch - W24151
This automatic diver's watch features a 45mm stainless steel case with a rotating unidirectional bezel and 200 metres of water resistance. The black dial incorporates luminous hour markers and hands for visibility in low light conditions, alongside a date window at the three o'clock position. The watch is powered by an automatic movement and secured by a stainless steel bracelet with a three-fold push-button clasp and diving extension.
The Prospex line positions this piece as a capable tool watch suited to diving and water sports. The 13mm case depth and substantial 45mm diameter give it a commanding presence on the wrist, whilst the robust construction and proven Seiko reliability make it a straightforward choice for those seeking a functional diver's watch without unnecessary complications.
The Seiko Diver's SPB101J1 is listed on WatchShopper as a 45 mm stainless steel automatic watch with a black dial, a date display, a rotating bezel, and 200 m water resistance. It is 13 mm thick and comes on a silver stainless steel bracelet. On 20 October 2026 the lowest UK price was £546.00 at F.Hinds, in stock, with free delivery and 30-day returns.
At £546 this watch is on the cheaper side for an automatic watch with a 43–47 mm case: 29% of the 324 we track from every brand cost less. 68% of the 329 Seiko watches we track cost less than this one. This is the 4th cheapest of the 9 versions of the Diver's we list.
