Seiko’s diving range is second to none, with models made for every type of water-loving person. Last year, the Japanese watchmaker resurrected the pro-rated Marinemaster SBDX001 from the early ‘00s but with much smaller proportions. The case was dropped from a husky 44mm to 39.5mm in diameter and, most notably, it was only 12.3mm in thickness. This was not only small for a professional dive watch but also the thinnest diver in the brand’s collection (and the only one with an exhibition caseback, which it had for some reason). The unique dimensions certainly fell in line with Seiko’s versatility but not necessarily with its namesake predecessor.
Now for 2024, Seiko has debuted a more fitting Marinemaster, finding a good middle-ground between compact and too large.
Seiko Prospex Marinemaster 2024 Basics
Sizing in the middle of the large and small versions from before, the 2024 models have 42.6mm stainless steel cases with case heights of 13.4mm. Available in both black (SLA079) and white (SLA077) dial versions, the new Marinemasters have a bezel redesign as well with a triangle around the top pip, while the screw-down crown is moved from the 3 to the 4 spot.
Back to the Roots
Last year’s models didn’t even look much like the SBDX001, as they took inspiration stylistically from Seiko’s 62MAS from 1965 — their very first diver. In comparison, the SBDX001 was based on Seiko’s first Professional divers from 1968, which are arguably more revered. The SLA077 and SLA079 follow suit here, with more design similarities to the original Marinemaster, which also include the look of the hands and indices.
A major issue fans had with the 2023 Marinemaster was the drop in water resistance as well. While the 2000-era models were rated to 300m, these compact versions went down to “just” 200m (which is still quite in the range for recreational diving). The 2024 models rectify this with a 300m dive rating once again.
Powered by a brand-new in-house 8L35 movement, the new Marinemasters are automatic, and with a 50-hour power reserve (up from 45 hours of last year’s models). Lastly, the watches get a classic three-link steel bracelet, which may be a small drawback in comparison to the 2023 references, which had a more premium finish.
What We Think
Needless to say, the 39.5mm Marinemaster is a fine diver for wearers looking for something a bit more accessible and comfortable. However, if it’s to bear the Marinemaster name, it should be more similar to the 2000’s models. That’s where this new Marinemaster — a true revival — comes in.
Spec Sheet
Case Size: 42.6mm
Case Thickness: 13.4mm
Case Material: Stainless steel
Movement: In-house 8L35 automatic
Band: Stainless steel bracelet
Limited Edition: No
Pricing & Availability
Not limited in edition size, the new Prospex Marinemaster models for 2024 will be priced at $2,900 when they drop later this month. Head over to Seiko’s website to learn more.
Recap
Seiko Prospex Marinemaster 2024
Seiko returns with new Marinemaster models more in line with the 2000 original. Last year saw a revival of the watch but it bore little resemblance to these hefty dive watches.
