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Seiko Prospex “GOLDEN TUNA” Marine Master Professional 1978 S23626 Luxury Watch Review

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The Seiko Prospex “GOLDEN TUNA” Marine Master Professional 1978 S23626 is a luxury watch that is sure to impress. Encased in 49.5mm of titanium and ceramic, this limited edition timepiece features a black dial with various functions including hours, minutes, seconds, month, and date. With a thickness of 16.3mm and a lug-to-lug diameter of 49.5mm, this watch is both stylish and practical. For a more detailed review and to see the watch in action, watch the full review on our YouTube channel, WatchBox Reviews. Visit our website at for the latest pre-owned luxury watch arrivals and exceptional value in previously loved timepieces.

Welcome to our channel! My name is Tim and I’m excited to introduce you to the Seiko Prospex “GOLDEN TUNA” Marine Master Professional 1978 S23626 luxury watch. This stunning timepiece pays tribute to the first Seiko quartz diver and features a modern twist with a contemporary diver design. The watch is made with high-quality materials such as titanium and ceramic, providing exceptional durability and scratch resistance. With its unique design and impressive features, the Seiko Prospex “GOLDEN TUNA” is built to stand the test of time. Don’t miss out on this incredible watch – visit our website,, to see it for yourself and browse our collection of pre-owned luxury watches.


The Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is an exquisite luxury watch that boasts an impressive set of specifications. Encased in titanium and ceramic, this timepiece exudes strength and durability. The black dial perfectly complements the sleek design, which is further enhanced by a black silicone strap. Measuring 16.3mm in thickness and 49.5mm from lug-to-lug, this limited edition watch is a statement piece, limited to only 1978 pieces.


The design of the Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is both unique and eye-catching. Inspired by the size and shape of a tuna can, this watch ensures that it stands out from the crowd. The accordion-style silicone strap adds an element of flexibility and comfort to the overall design, allowing for a perfect fit on the wrist. In addition, the cheese grater punched metal strap minder adds a touch of sophistication to the watch, while the nitride titanium buckle and bezel provide a luxurious finishing touch. The ceramic outer case not only enhances the aesthetic appeal of the watch but also provides scratch resistance, ensuring that the timepiece remains in pristine condition for years to come.


The unidirectional bezel of the Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is a standout feature. With its deep and sharp knurling, the bezel offers an excellent grip and allows for easy manipulation. The bezel is also incredibly easy to read, thanks to the clear markings and contrasting colors. Furthermore, the bezel is nicely resistant to movement, ensuring that accidental rotation is kept to a minimum, providing accurate timing for divers and professionals.

Seiko Prospex GOLDEN TUNA Marine Master Professional 1978 S23626 Luxury Watch Review


The dial of the Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is designed with utmost attention to detail. The giant cathedral-style hands not only add a bold and striking element to the watch but also offer excellent legibility in all lighting conditions. The AR coating on the inside of the sapphire crystal further enhances visibility by reducing glare. The dial also features professional script and a day and date feature, making it both functional and aesthetically pleasing. The elaborate day and date combinations add a unique touch to this timepiece, with three different languages displayed in three different colors.

Water Resistance

With a water resistance rating of 200 meters, the Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is a watch that can withstand the demanding conditions of underwater exploration. It is impervious to helium intrusion, making it suitable for saturation diving. The robust seals ensure that the watch remains watertight, providing peace of mind for divers who rely on its performance. The watch is engineered to withstand the pressure of deep dives without the need for a helium escape valve, making it a reliable companion for professional divers.


The Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is powered by the Seiko manufacture movement Caliber 7C46, which is known for its exceptional precision and reliability. This quartz movement features hacking, allowing for precise time setting, and a quick set double quick set function, making it effortless to adjust the day and date. One of the most impressive features of this timepiece is its eight-year power reserve, ensuring that the watch remains accurate and functional even after long periods of non-use. With an accuracy of plus or minus 15 seconds per month, this watch can be relied upon for precise timekeeping.


Durability is a key feature of the Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626. The combination of nitride and ceramic materials ensures that the watch is highly resistant to scratches, maintaining its pristine appearance over time. This timepiece is built to stand the test of time, with a design that is expected to look good even after 40 years of use. Whether worn during intense physical activities or in everyday life, this watch is designed to withstand the demands of a modern lifestyle.


The Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 excels in providing exceptional luminescence. The fully loomed dial, along with the triangular index on the bezel, ensures excellent visibility in low-light conditions. The proprietary Luma Bright material used in the watch’s luminescent elements offers long-lasting and vibrant illumination, allowing for easy time reading even in complete darkness. Additionally, the luminescent seconds hand adds a touch of elegance to the overall design of the watch, enhancing its visual appeal.


In conclusion, the Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is a luxurious timepiece that combines a unique design with exceptional durability. Its titanium and ceramic case, complemented by a black dial and silicone strap, create a striking aesthetic appeal. The unidirectional bezel, easy-to-read dial, and impressive water resistance make this watch highly functional for divers and professionals alike. With a Seiko manufacture movement and an eight-year power reserve, this timepiece offers both precision and endurance. The fully loomed dial and unique design details further elevate its status as a standout luxury watch. With its scratch-resistant materials and robust construction, the Seiko Prospex “Golden Tuna” Marine Master Professional 1978 S23626 is built to withstand the test of time. Overall, this watch exemplifies the fusion of style and functionality, making it a great choice for watch aficionados and professionals seeking a timepiece that ticks all the boxes.

I'm, your trusted guide to the captivating world of horology. At Mt. Watches, I am dedicated to providing you with a wealth of knowledge and resources when it comes to timepieces. Regardless of your expertise level, whether you're just starting your horological journey or have a refined taste for luxury watches, I have tailor-made content for you. My comprehensive guides, informative how-to articles, and expert reviews are carefully curated to enlighten, educate, and inspire you. From delving into the complexities of watch mechanics to staying updated on the freshest trends in luxury wristwear, your exploration of time begins and reaches the pinnacle of wisdom here at Mt. Watches.

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