The appeal of GMT functionality in Seiko modding has been a big draw for watch fans for years. Even before the NH34 movement came along, modders were adding 24-hour markers to their dials, simply because they loved the look—even if the watches weren’t true GMTs. This shows just how much excitement there was when genuine GMT movements finally hit the Seiko modding world.

GMT mods have since become a go-to way to take custom Seiko builds to the next level, adding both practical features and a sleek design twist. Being able to track multiple time zones is super handy for travelers and global professionals, but it also adds a bit of complexity and flair to any custom watch.

 

Source: @seikodiverr on IG

 

In this article, we’ll dive into three creative Seiko GMT mod ideas inspired by legendary designs: the Alpinist, Grand Seiko Dive, and SRPE. These concepts will hopefully get the creative juices flowing, so you can create your personal GMT watch build.

Alpine Tool Watch GMT

Source: @svkwatches.ae on IG

 

Many tout the Alpinist as one of the best offerings by Seiko, and we agree. Though it was originally marketed towards Japanese mountain hikers, it achieved a much wider appeal thanks to its great value, durability, and of course, a very likable aesthetic. When we released our Alpinist-inspired tool case, a lot of Seiko modders got excited at the idea of customizing one for themselves. 

Of course, we didn’t forget to create a GMT version of the case for the Dual Time fans out there. In fact, we made it quite easy! Aside from having a case bundle that comes with a 24-hr bezel pre-installed, we also released dial variants with “GMT” text in it to match. Now you just have to pick which color you like best, get an NH34 and a GMT hand along with your case order, and you’re well on your way to an Alpine Tool Watch GMT.

By the way, we hear your passionate requests for alternative chapter ring options aside from the compass. Many of you are requesting for 60 minute timers, 24-hour trackers, plain chapter rings, and more - the team is already working on releasing alternatives so please do keep an eye out for those!

 

Grand Seiko Diver GMT

Source: It's Another Watch on Youtube

 

Our NMK944 GS Dive case is another popular release that’s commonly used for GMT builds. Seiko modders love it for its hefty profile, sharp details, and comfortable wear - and as a bigger canvas (it’s a 43mm case), it can take on the extra GMT complication without looking as crowded.

The best-looking one we’ve seen yet is in our collaboration with Dan from It’s Another Watch, where he builds his first NH34 watch. The neutral blue PADI dial really shines in this watch case, giving it an “OEM+” look. The ceramic insert he used was a black one with Seiko-style 60 minute graduations, opting to put the 24-hour tracker on the chapter ring. For a bit of color, he adds a gold accent with the seconds hand and GMT hand, which is further complemented by the gold Asanoha patterned rotor at the back. And while the case’s appeal is in its substantial size, it still looked great with the slim LX bezel and slim display caseback.

You can also go for a more toned down build. Since the angular design of the case already adds a lot of character to the end watch, you can opt for a slim, non-rotating GMT bezel, a plain chapter ring, and a sterile slim caseback. At this point, the watch might look too dull color-wise, so you can play around with your dial and handset choices to give it a bit of paint.

 

SRPE GMT

 

Now let’s go the other direction and use an SRPE case, whose charm lies in its smaller frame and minimalist style. We have a couple of SRPE case choices available in our store which will be great for field, pilot or dress watch Seiko mods. Despite the smaller size, all of them are compatible with the NH34 as long as you’re using the correct double-domed crystal.

Since SRPE cases usually use a fixed, minimalist bezel, you’re limited to using a 24-hour chapter ring or a dial with 24-hour markers, a-la Khaki Field. Here’s an example from customer Sebastien, who uses the NMK922 PVD Black SRPE case along with a Spork-style dial and Pilot hands. The GMT hand is a hot red which complements the chapter ring with red accents, and further matched by the black and red NATO strap. Looks quite ready for the field!

 

 

Here’s another great example from customer Nigel, who uses the NMK918 Pilot style SRPE case but with a dressier appearance thanks to the B&R dial and a mixed handset. The build is put on a black leather strap for extra class.


Wrap Up

GMT mods have truly transformed the Seiko modding game, adding both functionality and style to custom builds. The above featured cases may look quite different visually, but with planning and some inspiration, any GMT build will turn out looking awesome! 

Whether you want to build a 4-handed watch or want to stick to the usual day/date complication, you’ll want to check out our huge and growing catalog of Seiko mod parts. From crystals to the caseback, and everything in between, we have the parts you need for your next premium watch build. And if you have any questions, please feel free to contact us at support@namokimods.com for assistance.

Happy modding!

19 septiembre 2024 — Jeremiah A

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