Seiko SPB125 is arguably one of the coolest Sumo watches with its all-black coating. It complements the Seiko Sumo line up which usually comes with a stainless steel case. Thanks to its looks, the Sumo is currently one of the most popular watches from the brand. Aside from sleeker-looking, this one is an exclusive watch, as it is a limited edition.

The black hard coating on the stainless steel case transformed the watch. It gives it a sportier yet an understated look. It makes the watch less formal than its other brothers. The all-black finishes also perfect for one that searching for that stealthy look. On top of the dark tone, a pop of orange color on the indices and the minute hand-balances things up. Making the watch also a highly legible one.

What makes the watch more unique is its Lumibrite, Seiko’s luminous paint that makes sure legibility in the dark. While usually, it’s in green when lit up, Lumibrite on this one is atypical as it has an orange color. Protecting the dial is a sapphire crystal, for peace of mind as its more scratch-resistant than a mineral crystal.

The case of the Sumo is very popular because of its design. The peculiar shape is bulky yet still comfortable to wear. It’s a big watch with a 45 mm case. However with a 52.5 mm lug to lug it will still fit most wrists. The Seiko SPB125 is also thinner than the original Sumo that launched in 2007. The watch is only 12.9 mm thick compared to the original 13.5 mm.

Flip the watch to find the limited edition engravings on the case back. There is also Seiko’s signature wave in the center. The screw-down case back also got its all-black treatment. A proper finish as some lower quality watches only black coated the case.

Beneath the case is the 6R35 automatic movement, featuring a 70 hours power reserve and manual winding capability. It’s a worthy upgrade from a lower-priced Seiko watches. These watches usually have a power reserve of 40 hours and don’t have an option for manual winding. The accuracy of the 6R35 that has 24 jewels is also respectable at +25 to -15 seconds per day.

As it is a part of the Prosphex line, which means it’s up to standard for professional divers. The watch has a screw case back and screw-down crown, enabling a water-resistance of up to 200 meters. Completing its diver’s watch look is its black rubber band, a comfortable and high-quality one from Seiko as always.

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