Grand Seiko SBGM245 Review: Worthy Alternative to the Explorer?

A close friend of mine is a bigger fan of Grand Seiko than anyone I know. His collection is predominantly filled with models from the brand’s Heritage, Elegance, and Sports families, and he’s often the person I go to when I have any questions or concerns about a particular model. 

It wasn’t all that long ago when we were chatting in-depth about GMTs, and I asked him which dual time-telling model from Grand Seiko would be his go-to recommendation. He mentioned several models, including the Spring Drive-powered SBGE253 and the beautifully dressy and impressively affordable SBGM221.

But the watch he spoke most passionately about was the Grand Seiko Sport GMT SBGM245 watch. He described it as one of the best GMT sports watches on the market, being wearable, attractive, and well-priced for the list of specs that are included. 

So, of course, as any watch-obsessed writer would, I went out to find the watch for myself and tried it for a full week to see if it was really as good as he suggested. So here I am, reviewing the Grand Seiko Sport GMT SBGM245…

When Was the Grand Seiko Sport GMT SBGM245 Released?

I’m not sure how it happened, but the Grand Seiko Sport GMT SBGM245 watch was one of those releases that flew under the radar for me. I don’t know what other watches were being released at the same time, but it must have been something good for me to not have noticed a new GMT model from Grand Seiko. 

The design was first launched in 2021, towards the end of the year, and joined the Japanese watch brand’s collection alongside an equally attractive olive green-dialed variant.

Grand Seiko has never had a shortage of GMT models in their arsenal, but some of the most compact references were those with quartz movements. Now, don’t get me wrong, I love quartz watches – especially those by Grand Seiko – but if budget allows, I will always choose a mechanical timepiece. I’m a sucker for the craftsmanship and complexity that goes into a mechanical movement. 

But, the majority of Grand Seiko’s mechanical GMTs were a little large in size, typically measuring around 44mm in diameter. But with the Grand Seiko Sport GMT SBGM245 watch and its green-faced counterpart, you’re getting both a mechanical movement and a compact set of case dimensions.

A Sporty but Compact Case

Sports watches, GMT watches, and sport GMT watches are typically large with statement dimensions to make an impact. This is fine if you have the wrist real estate to pull it off, but alas, with my five-and-a-half inch wrist, I’ve always found shopping for a solid sports watch incredibly difficult. So, when I saw the dimensions of the Grand Seiko Sport GMT SBGM245 watch, I was over the moon. Finally, a sports GMT model that I could wear! 

Its dimensions include a 40.5mm width and a lug-to-lug of 48.6mm. On my wrist, it sits really nicely. It gives off that oversized sports watch aesthetic – something I absolutely love – with the short, downward-turned lugs helping to keep the watch nice and close to the skin. It’s a relatively thick watch, at 14.4mm tall, but it’s what you’d expect from a watch of this genre. 

At the end of the day, it’s a sports watch, not a dress watch, and we’ve got to take into account the prominent bezel, which gives the design so much of its personality, and the movement inside, which includes an extra layer of hardware for the GMT hand. That said, I can still imagine this watch sliding under the cuff of a dress shirt, as long as it’s one that’s not too tight. 

Despite this being one of Grand Seiko’s entry-level mechanical sport GMT watches, the finishing of the stainless steel case is exceptional. It delivers the same high levels of attention to detail as some of their more expensive models. It has satin-brushed finishing on the lug hoods and bright polishing on the case flanks. A beautiful sharp bevel separates the lugs from the case sides to help add to the watch’s sporty, streamlined architecture. 

This bevel, along with the case flanks, are brilliantly polished using Grand Seiko’s Zaratsu polishing technique. Also known as black polish, this is a high-end finishing that requires talented artisans who have trained for three years to meticulously hand polish the steel by holding it against a spinning tin plate. It’s a complex process, but one that delivers an exceptional mirror-like shine.

Giving the Grand Seiko Sport GMT SBGM245 watch its tool-like personality is the bezel placed atop. Finished in matching stainless steel, the polished and satinized surface is handsomely etched with black-colored numerals for the 24-hour scale. If you still question this watch’s sportiness, know that it also comes with a screw-down crown at 4 o’clock and a closed case back offering a 200-meter water resistance. 

A Hand-Finished Dial

Every piece of shiny hardware seen on the Grand Seiko Sport GMT SBGM245 watch’s dial is hand-finished, like the case. These lovely little pieces of dial furniture are once again polished by hand using diamond-tipped milling tools to create this lustrous shine. 

The hardware isn’t just singularly treated either but features brushing and polishing on the same component to create this wonderful visual effect of light play. For example, the hands at the center have beveled and polished edges and satinated centers, adding to their sharp and aggressive aesthetic. Similarly, the hour markers are faceted and boast their own combination of polishing and brushed finishing.

The hardware, all of which is also placed entirely by hand, sits on a gorgeous sunburst blue dial that plays with the lighting conditions depending on how you angle your wrist. One minute, the color is a rich navy blue; the next, it’s almost jet black. 

Even in the dark, the dial impresses with a generous amount of Lumibrite (Grand Seiko’s go-to luminous material) added to the hands and the four markers at each cardinal point. At night, these elements glow a rich green, providing you with effortless legibility no matter your surroundings.

The central GMT hand, finished in bright red for exceptional contrast, has its own arrow-shaped luminous tip. Its color pairs with the GMT text at 6 o’clock, also printed in red sitting beside white lettering to denote its automatic movement. 

Working with this complication is the sloped flange around the dial’s center, which is printed with a second24-hourr scale and has a dual-toned backdrop to showcase the day hours in silver and the night hours in navy blue. 

The only other features of the dial I’m yet to mention include the applied GS logo at 12 o’clock and the date window positioned at 4 o’clock. I appreciate the integration of the date window where the 4 o’clock hour marker should be, plus the nicely polished border. But would this dial look better without a date? Yes, I think so. Or at least let’s incorporate a blue date wheel to allow it to blend into the dial design a little more subtly.

An In-House Movement

As mentioned, the case back of the Grand Seiko Sport GMT SBGM245 watch is closed. It’s a shame, as I always love to see the workings of a mechanical movement, but we do have to keep in mind that its closed nature helps to assist in its healthy 200-meter water resistance. The case back is nicely decorated, showcasing a lovely beaded border and the Grand Seiko lion logo at the center in relief.

The exact movement hiding behind this steel component is the Caliber 9S66 automatic winding movement. It’s a movement made entirely in-house by Grand Seiko and regulated in their own facilities, promising an accuracy of +5 to -3 seconds per day. To receive this rating, the movement has been measured in six positions and placed under stress in artificially controlled environments for 12 days.

We’re promised a 72-hour power reserve, so you can easily take this watch off on Friday and put it back on Monday morning without worrying about lost time. It also pivots on 35 jewels, has stop seconds, and, of course, the added date and GMT complications for improved functionality.

Straps

There is beautiful satin-brushed finishing across the top and conforming end links for a comfortable fit. I’ve always liked the slight rolled bevel on these Grand Seiko bracelets. They have a lovely polished outer surface, giving the watch a contemporary look. 

The links are screw fixed and can be removed to achieve a more accurate fit. To help, there are several half links on either side, plus micro-adjustment holes on the stamped clasp. The twin push button release clasp is effortless to use and is nicely presented with the GS logo in relief. 

There’s a 20mm space between the drilled lugs, so finding and changing out alternative straps for the Grand Seiko Sport GMT SBGM245 watch is made easy. If you’re like me and you have relatively small wrists, note that this will wear even more compactly on a strap rather than a bracelet.

On-Wrist Experience

The Grand Seiko Sport GMT SBGM245 is a fantastic watch that wears surprisingly comfortably for its size. With a 40.5mm width, it’s one of the most compact GMT sports watches out there, which is a huge plus for folks like me with smaller wrists—I’m rocking a five-and-a-half-inch wrist, and even though it’s a big watch, I love that oversized look. 

If your wrists are around six inches or more, this watch will fit perfectly; any smaller, and you might find it feels a bit too large. Any bigger than eight inches, and you might find it too small.

The 14.4mm height does make it thicker than your average dress watch, as it houses that impressive GMT movement. But don’t worry—it’s not so thick that you can’t slip it under a dress shirt. 

While this is definitely a tool watch and not a dress watch, I can still see it dressed up for formal occasions, too. The angled lugs and conforming end links of the bracelet make it super comfortable to wear all day, whether you’re at the office or out on an adventure. Overall, this watch strikes a great balance between functionality and style.

Price & Availability

Retailing for $5,700, the Grand Seiko Sport GMT SBGM245 watch has become one of the Japanese watchmakers’ entry-level mechanical GMT sports watches. It’s incredibly well-priced for the high levels of case and dial finishing and technology going on inside. 

It’s a permanent piece in their collection, meaning it’s not limited to a specific set of pieces, but since it has been out on the market since 2021, it might not be a model that stays around for much longer.

If you choose to order the design, please ensure it’s through an authorized retailer like Exquisite Timepieces so you can feel confident you’re getting a genuine watch with all the official paperwork and warranty.  Alternatively, you may be able to find it on the second-hand market for around $3,500 to $4,000.

Conclusion

Following my friend’s advice has never let me down, and after reviewing the Grand Seiko Sport GMT SBGM245 at his suggestion, I can confirm he’s one to trust yet again. This watch is beautifully executed in every way. The case is sporty and streamlined, making it incredibly comfortable to wear, allowing even those of us with smaller-than-average wrists to enjoy the statement that comes with a sporty GMT watch.

What truly sets this watch apart, though, is the exceptional hand-finishing. In a world where many luxury watches skimp on this detail, the Grand Seiko Sport GMT SBGM245 stands out.