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Seiko Prospex Sumo SPB101J1 Review: A Diver’s Watch Worth the Investment

by Thomas Jentzsch on April 15, 2023

When it comes to diving watches, Seiko is a brand that needs no introduction. The Japanese watchmaker has been producing high-quality timepieces for divers for decades, and the Seiko Prospex Sumo is no exception. The SPB101J1 is a highly sought-after model in the Seiko Prospex collection, and it's easy to see why. With its impressive build quality, reliable movement, and stunning design, the Seiko Prospex Sumo is a watch that's built to last. In this review, we'll take a closer look at the SPB101J1 and explore what sets it apart from other diving watches on the market. From its impressive water resistance to its robust construction, we'll cover everything you need to know about this exceptional timepiece. So, without further ado, let's dive into our Seiko Prospex Sumo review.

Brand Summary

Seiko is a Japanese brand that produces high-quality watches, including the Seiko Prospex Sumo. The SPB101J1 model is a popular choice among watch enthusiasts due to its durable construction and reliable performance. The brand is known for its attention to detail and commitment to innovation, making it a trusted name in the world of luxury timepieces.

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Watch Details

The Seiko Prospex Sumo is a highly regarded dive watch that was first introduced in 2007 as a successor to the Seiko SKX series. The latest iteration of the Sumo, the SPB101J1, was released in 2019 and has quickly become a favorite among watch enthusiasts.

One of the most notable features of the Seiko Prospex Sumo is its robust build quality. The watch is water-resistant up to 200 meters and is constructed with a durable stainless steel case and bracelet. The watch also features a screw-down crown and case back, ensuring that it remains secure and watertight during any underwater activities.

In terms of design, the Seiko Prospex Sumo has a distinctive aesthetic that sets it apart from other dive watches. The watch has a bold and chunky case, with a large bezel that is easy to grip and turn. The dial is simple and easy to read, with large hour markers and hands that are coated with Seiko’s proprietary Lumibrite material for enhanced visibility in low-light conditions.

The Seiko Prospex Sumo is powered by Seiko’s 6R35 automatic movement, which provides a power reserve of up to 70 hours. The movement is accurate and reliable, and has been tested to meet Seiko’s high standards for precision and durability.

In terms of pricing, the Seiko Prospex Sumo is considered to be a mid-range dive watch, with prices ranging from around $600 to $800 USD depending on the specific model and retailer. The watch is widely available from authorized Seiko dealers and online retailers, making it easy to find and purchase.

Overall, the Seiko Prospex Sumo is an excellent choice for anyone in the market for a high-quality dive watch. With its robust build quality, distinctive design, and reliable movement, it is a watch that is sure to provide years of reliable service and enjoyment.

Key Features

  • Durable and reliable automatic movement
  • Water resistant up to 200 meters
  • Stainless steel case and bracelet
  • Unidirectional rotating bezel for diving
  • Luminous hands and markers for visibility in low light
  • Date display at 3 o’clock position
  • Screw-down crown for added water resistance
  • Hardlex crystal for scratch resistance
  • Power reserve of approximately 70 hours
  • Distinctive and attractive design

 

PRO (+)

  • Durable and robust build quality
  • Water-resistant up to 200m
  • Highly accurate automatic movement
  • Stylish and versatile design suitable for any occasion
  • Large and easy-to-read dial with luminescent hands and markers
  • Unidirectional rotating bezel for timing dives or other activities
  • Scratch-resistant sapphire crystal glass
  • Comes with a comfortable and secure stainless steel bracelet
  • Reliable and reputable brand with a long history of producing quality timepieces

CONTRA (-)

  • Large size may not be suitable for all wrist sizes
  • Relatively expensive compared to other dive watches
  • Lack of a date magnifier may make it difficult to read the date
  • May not be suitable for formal occasions due to its sporty design
  • May require regular servicing to maintain accuracy and performance

Comparable Watches

When it comes to comparable watches to the Seiko Prospex Sumo (Reference: SPB101J1), there are a few options worth considering. One such watch is the Seiko Prospex Turtle (SRP777). Like the Sumo, the Turtle is a dive watch with a similar design and build quality. It also features a reliable automatic movement and a durable stainless steel case. However, the Turtle is slightly smaller than the Sumo, making it a better option for those with smaller wrists.

Another comparable watch is the Citizen Promaster Diver (BN0151-09L). This watch also boasts a water resistance of up to 200 meters and a reliable automatic movement. However, the Promaster Diver has a more modern design with a larger case and a more colorful dial. It also features a solar-powered movement, making it a more eco-friendly option.

Lastly, the Orient Kamasu (RA-AA0004E19A) is another comparable watch to the Seiko Prospex Sumo. It features a similar design with a stainless steel case and a reliable automatic movement. However, the Kamasu has a slightly smaller case size and a more affordable price point, making it a great option for those on a budget.

Overall, these watches offer similar features to the Seiko Prospex Sumo and are worth considering for those in the market for a high-quality dive watch.

Watch Collectors Opinions

The Seiko Prospex Sumo has garnered high praise from watch collectors and reviewers alike. Many have noted the watch's impressive build quality, with its durable stainless steel case and bracelet, screw-down crown and case back, and water resistance up to 200 meters. The watch's design has also been a standout feature, with its bold and chunky case, large bezel, and easy-to-read dial. The Lumibrite-coated hour markers and hands have also been well-received for their enhanced visibility in low-light conditions.

The Seiko Prospex Sumo's 6R35 automatic movement has also been highly regarded for its accuracy and reliability, boasting a power reserve of up to 70 hours. The watch's mid-range price point has also been noted as a strong selling point, with prices ranging from around $600 to $800 USD depending on the model and retailer.

Overall, the Seiko Prospex Sumo has been praised as an excellent choice for anyone in the market for a high-quality dive watch. Its combination of robust build quality, distinctive design, reliable movement, and accessible pricing make it a standout option in the crowded dive watch market.

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Conclusion

In conclusion, the Seiko Prospex Sumo (reference: SPB101J1) is a dive watch that lives up to its reputation. From its robust build quality and distinctive design to its reliable movement and accessible pricing, this watch has everything a diver or watch enthusiast could want. The watch's water-resistant capabilities up to 200 meters, durable stainless steel case and bracelet, and screw-down crown and case back ensure that it can withstand any underwater activities. The large bezel and easy-to-read dial with Lumibrite-coated hour markers and hands make it easy to track time even in low-light conditions. The Seiko Prospex Sumo's 6R35 automatic movement is highly accurate and reliable, boasting a power reserve of up to 70 hours. The watch's mid-range price point also makes it an attractive option for those looking for a high-quality dive watch without breaking the bank. Overall, the Seiko Prospex Sumo is a watch that has garnered high praise from collectors and reviewers alike, and it's easy to see why. If you're in the market for a dive watch that is both functional and stylish, the Seiko Prospex Sumo is an excellent choice that won't disappoint.

FAQs

1. What is the difference between the Seiko Prospex Sumo SPB101J1 and the SPB101J?

The Seiko Prospex Sumo SPB101J1 and the SPB101J are essentially the same watch, with the only difference being the color of the dial. The SPB101J1 has a black dial, while the SPB101J has a blue dial.

2. Is the Seiko Prospex Sumo SPB101J1 water-resistant?

Yes, the Seiko Prospex Sumo SPB101J1 is water-resistant up to 200 meters. This makes it suitable for swimming and diving.

3. What is the power reserve of the Seiko Prospex Sumo SPB101J1?

The Seiko Prospex Sumo SPB101J1 has a power reserve of approximately 70 hours. This means that it can run for up to 70 hours after being fully wound.

4. What is the case material of the Seiko Prospex Sumo SPB101J1?

The case material of the Seiko Prospex Sumo SPB101J1 is stainless steel. This makes it durable and resistant to corrosion.

5. Does the Seiko Prospex Sumo SPB101J1 have a date function?

Yes, the Seiko Prospex Sumo SPB101J1 has a date function located at the 3 o’clock position on the dial. The date can be easily adjusted using the crown on the side of the watch.

 

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