Seiko Sumo Prospex Diver 200m SPB103J1

Seiko Sumo Prospex Diver 200m SPB103J1

“The Hulk”

A fan favourite from its launch in 2007 through to just last year, the Seiko SBDC031 – affectionately known by the nickname “Sumo” – has just been updated, in a striking new look that some have begun to call, “The Hulk”, due to its resemblance to Marvel Comics’ jade giant.

The new Seiko Sumo, or Prospex Diver 200m SPB103J1, has retained many of the looks and features that made the original Sumo so popular, but has been evolved to fit a 2019 aesthetic.

As fits the name, the watch has kept its large, usual Seiko shape, with sharp angles, polished facets and the hallmark 4 o’clock-positioned screw-down crown. The watch still has a 45mm diameter, with a height of around 13.5mm. It also remains 52.5mm from lug to lug. As bulky as the watch may seem, it still feels surprisingly balanced, and can fit quite well on even the smallest wrist.

As the name suggests, the case is water resistant to 200 metres. The Seiko Prospex Diver 200m SPB101J1 is worn on a 3-link bracelet, featuring polished accents and brushed surfaces, and a safety clasp with a wet-suit extension.


On the Face of It

The bezel itself has kept the look of the original Sumo with its coin like edging. However, the typeface used for the 60 minute scale on the insert has been updated for the times, with less exaggerated numbers encircling the internal facet (which remains the same from the previous model).

A sapphire crystal face has replaced the previous mineral “Hardlex” glass face, making the new Sumo smoother, and almost impossible to scratch. Importantly, behind this improved face sits a new look for the 2019 Seiko Sumo Prospex Diver 200m, featuring a dazzling green sunburst dial. This, when complemented by a matching bezel insert, truly makes this watch stand out next to blue tinted watches, and earning it the jade giant’s “Hulk” moniker.

Keen eyes will notice that the highly luminous hands have had some minor tweaks. The minute hand has been reduced to a much more slimline look, with the hour hand decorated to match the Sumo theme. These balance well against the watch face, on which Seiko have kept the original indexes and markers, inscriptions and white framed date box.


Seiko Sumo Prospex Diver 200m SPB103J1

Seiko Sumo Prospex Diver 200m SPB103J1


Behind the Scenes

The new Seiko Sumo SPB103J1 keeps the base from the previous version of the watch, with a 3Hz frequency, quick-set date, a central rotor for the automatic winding, and a stop-second device.

However, the updated model is now powered by the calibre 6R35 and the power reserve has been improved to an impressive seventy hours from the previous fifty.

These workings are all hidden behind a screwed steel case back.


Seiko Sumo Prospex Diver 200m SPB103J1

Seiko Sumo Prospex Diver 200m SPB103J1


If the new and improved Seiko Sumo has piqued your interest, you can learn more about it or purchase it from the Seiko Sumo Prospex Diver 200m SPB103J1 product page.

Above all, we have this watch in stock now, and offer free next day delivery, 30 day returns and a secure checkout.