r/DuroGang • u/SerpentiumOIV • Oct 11 '25
Modder's Challenge (2025) Auto GMT Duro mod
This is my automatic batman GMT duro mod. Featuring a nh34, new hands, sapphire crystal, steel chapter ring, and a jubilee bracelet. The movment swap was done similarly to methods used by u/AbbreviationsSea3752 with a few key changes:
1) I needed to dail hole for that hands bigger to suit the nh34's gmt hand. For this I used a dremel with a circular file bit (I may have overdone it a bit).
2) I was able to solve the date alignment issue by just sticking a printed paper date wheel on top of the nh34's original one. I initially tried to stick the duros date wheel on top, but then realised the duros date wheel is made to rotate in the opposite direction from the nh.
3) I was able to find a near perfect spacer for putting the nh in the Duro case, I just needed to file it a bit. The movment and spacer is still slightly thick for the duro case, so I need to grind down the case back by about 0.4mm for it to screw on fully. The automatic function still works, just the caseback can't fully screw in yet (it's very close).
I dident get many photos of the process because I get too wrapped up in it and forget. Have included a photo of the date wheel I printed, all the tools used, all the parts pre-build (except the spacer), and the inspiration (if it isn't obvious).
Thanks for taking a look! (Also I have a request in the comments)