Your Bag

Nothing in cart

On-Hands: Seiko Prospex PADI “Great Blue” Sumo Review
Shop Highlights

On-Hands: Seiko Prospex PADI “Great Blue” Sumo Review

A casual, versatile, and robust dive watch, the Seiko Prospex PADI “Great Blue” is a true diving companion you can have. Explore here!

Apr 15, 2024

In the world of dive watches, few names stand as proudly and resolutely as Seiko Prospex. Renowned for their commitment to precision, durability, and functionality, Seiko Prospex timepieces are trusted companions for both professional divers and enthusiasts alike. 

Among their illustrious lineup, the Seiko Prospex PADI "Great Blue" holds a special place, embodying the essence of Seiko's deep-rooted heritage and commitment to the exploration of the underwater world. 

In this article, we will delve into the fascinating world of the Seiko Prospex PADI "Great Blue," uncovering its impressive features, its connection with the Professional Association of Diving Instructors (PADI), and its exceptional design that celebrates the allure of the deep blue sea.

The Heritage of Seiko Prospex and PADI Collaboration

Seiko's journey in crafting professional diving watches began over half a century ago, and the Prospex collection, short for "Professional Specifications," has been at the forefront of this legacy. 

Since the release of the first Seiko diving watch in 1965, Seiko has been a pioneer in creating timepieces that withstand the rigors of deep-sea exploration. The Prospex line, introduced in 1968, continued this tradition by developing robust and reliable watches for divers venturing into uncharted territories. 

The collection has evolved over the years, combining technological advancements with timeless design, making Seiko Prospex an epitome of excellence in dive watches.

The Seiko Prospex PADI "Great Blue" is a product of a fruitful collaboration between Seiko and the Professional Association of Diving Instructors (PADI).

PADI, the world's leading scuba diving training organization, is committed to promoting underwater exploration, conservation, and education. Started in 2016, this partnership reflects the shared values of both entities, their dedication to underwater enthusiasts, and the preservation of the world's oceans.

Read also: Review: Seiko Prospex Sumo Diver Green 3rd Gen Ref. SBDC081

Seiko Prospex PADI “Great Blue” Review

We have two models in our store, the Prospex PADI “Great Blue” 200M Sumo Ref. SBDC189 and Prospex PADI “Great Blue” 200M Scuba Diver Solar Ref. SBDJ057.

But, in this Seiko Prospex PADI “Great Blue” review, we’re going to scrutinize the Sumo model. Let’s dive in!

Design and Aesthetics

True to its name, the "Great Blue" draws its inspiration from the mesmerizing shades of the deep ocean. The watch features a rich blue dial reminiscent of the vast sea depths, capturing the essence of exploration and adventure. 

The color evokes a sense of tranquility and serenity, contrasting elegantly with the luminescent hour markers and hands, which ensure readability in even the darkest underwater conditions.


The 45mm stainless steel case exudes sturdiness and is enhanced by a scratch-resistant sapphire crystal, providing reliable protection against the perils of the deep. Its bulky appearance is further elevated with the bold bezel markers.

Paying homage to the latest Sumo, the watch maintains its design continuity with its predecessors through several distinct features, including the presence of a 4 o'clock crown, a robust bezel that frames its distinctive dial, large lugs, and an overall circular shape.

The unidirectional rotating bezel, a crucial feature in dive watches, is adorned with a blue ceramic insert, adding a touch of sophistication and ensuring precise timing during dives.

Watch Dial

Speaking of the dial of Seiko Prospex PADI “Great Blue”, it introduces an attractive azure dial that evokes the graduated blue hues of the ocean, featuring wave patterns on its upper half, reminiscent of the sea's surface. 

Completing the ensemble, the watch showcases a two-tone handset, with the minute hand complementing the light blue theme to perfection.

Further, underwater legibility is paramount for a dive watch, and Seiko addresses this with its proprietary Lumibrite technology

The hands and markers are coated with Lumibrite, a luminescent material that glows brightly in low-light conditions after exposure to light. This technology ensures clear visibility in the darkest ocean depths, providing divers with critical information at a glance.

Read also: Everything You Need to Know About Super-LumiNova Watches


As a professional dive watch, the Seiko Prospex PADI "Great Blue" boasts remarkable water resistance. It can withstand pressures of up to 200 meters (660 feet), making it suitable for recreational diving and most professional underwater activities. 

Its screw-down crown ensures added security against water ingress, further enhancing its reliability in aquatic environments.

The watch is equipped with the renowned Seiko Calibre 6R35 automatic movement, known for its accuracy and robustness. 

The movement features a power reserve of approximately 70 hours, providing sufficient autonomy for daily wear or short periods off the wrist without requiring constant rewinding.


The Seiko Prospex PADI "Great Blue" is available with two distinct strap options, each catering to different preferences and requirements. 

The first option is a robust stainless steel bracelet with a secure three-fold clasp and a diving extension, ensuring a comfortable and secure fit over a wetsuit. 

The second option offers a blue silicone strap with a matching stainless steel buckle, combining durability with a sporty and casual look.

Final Thought

The Seiko Prospex PADI "Great Blue" is a compelling tribute to Seiko's heritage of precision and durability in the realm of dive watches. Its stunning aesthetics, remarkable water resistance, and functional design make it an ideal companion for both professional divers and ocean enthusiasts. 

As a proud collaboration with the Professional Association of Diving Instructors (PADI), the "Great Blue" not only celebrates the beauty of the underwater world but also emphasizes the importance of responsible diving and ocean conservation.

Read also: Our 8 Favorite Seiko Dive Watches Perfect for Sea Exploration

You may like this

Related Articles

Comparison Chart

No watches in comparison chart

Artboard 1
Artboard 1



Lug width

Water resistance


Lug Width
Water resistance