How to Build a Seiko GMT Mod (NH34) | Step-by-Step Tutorial - COKE GMT

In this video, I’ll show you how to build your own Seiko NH34 GMT mod from start to finish. You can follow this build or experiment with different components to create your own custom GMT watch. For this build, I’m assembling the Atelier Crimson GMT—a premium, custom-branded watch featuring an Atelier dial, black-and-red “Coke” 24-hour bezel, stainless-steel Jubilee bracelet and genuine Japanese Seiko NH34 automatic GMT movement. The Atelier Crimson GMT is part of my personal watch brand. Its premium-quality components are custom engraved and printed specifically for Atelier. Whether this is your first Seiko mod or you’re an experienced watch builder, this tutorial covers the complete process—from installing the dial and four hands to casing the movement and revealing the finished watch. The NH34 movement features an independently adjustable GMT hand, allowing you to track a second time zone using the 24-hour bezel. ⌚ BUILD DETAILS • Genuine Japanese Seiko NH34 automatic GMT movement • Custom Atelier-branded black GMT dial • Black-and-red “Coke” 24-hour bezel • Premium stainless-steel GMT case • Sapphire crystal with date cyclops • Stainless-steel Jubilee bracelet • Custom red GMT hand • Atelier-engraved and printed components • 200 m water resistance 🔧 IN THIS VIDEO • Preparing the NH34 movement • Installing the custom Atelier dial • Installing the GMT, hour, minute and seconds hands • Checking hand alignment and clearance • Installing the movement inside the case • Cutting and fitting the crown stem • Installing the caseback and bracelet • Revealing the finished Atelier Crimson GMT 🌐 CHECK OUT MY WATCH BRAND Visit Atelier Melbourne: https://ateliermelb.com.au Atelier watches use premium-quality stainless steel, genuine Japanese movements and carefully selected components. Every order is hand assembled and backed by a two-year warranty. Follow Atelier on Instagram:   / atelier.melb   An exciting, completely custom-designed Atelier watch is coming soon. Follow along for the official reveal and future release updates. If you enjoyed this NH34 GMT build, please like the video, subscribe to Jacks Watches and let me know in the comments which watch I should build next. ⚠️ DISCLAIMER This video is intended for educational and entertainment purposes. The Atelier Crimson GMT is an independently assembled custom watch and is not affiliated with, endorsed by or manufactured by Seiko or Rolex. “Seiko mod” refers to a custom-built watch using a genuine Seiko movement and compatible aftermarket components. It does not indicate an official Seiko product. 🎵 MUSIC CREDITS Song: Warm Horizon Composer: Purrple Cat Website:    / purrplecatmusic   License: Creative Commons BY-SA 3.0 https://creativecommons.org/licenses/... Music powered by BreakingCopyright: https://breakingcopyright.com Song: Leaving Composer: AERØHEAD Website:    / @aero_head   License: Creative Commons BY-NC 3.0 https://creativecommons.org/licenses/... Music powered by BreakingCopyright: https://breakingcopyright.com Song: Day In Paris Composer: Pyrosion Website:    / @pyrosionmusic8562   License: Free To Use YouTube License — youtube-free Music powered by BreakingCopyright: https://breakingcopyright.com Song: Shizuka Composer: AERØHEAD Website:    / @aero_head   License: Creative Commons BY-SA 3.0 https://creativecommons.org/licenses/... Music powered by BreakingCopyright: https://breakingcopyright.com #AtelierCrimsonGMT #AtelierMelbourne #SeikoMod #NH34 #NH34GMT #GMTWatch #CokeGMT #WatchMod #CustomWatch #SeikoGMT #WatchBuilding #Watchmaking #DIYWatch #AutomaticWatch #AtelierWatch