Modification specialists are experts on SEIKO watch modification and customisation. They are carefully selected and curated onto this list for anyone wanting modification or customisation work done on a SEIKO watch close to home.
Contact a specialist directly to discuss what you want built, their rates and their lead times. Entries marked Watchmaker are trained professional watchmakers.
| Country | State / City | Specialist | Contact |
|---|---|---|---|
| Canada | Alberta, Calgary | Nixon / NXNMODS | EmailInstagram |
| Canada | Ontario, Toronto | Namir al-Aasm / NhorologylabWatchmaker | EmailWebsiteInstagram |
| Canada | Ontario, Whitby | Scott / WatchMods.ca | EmailWebsiteInstagram |
| China | Jiangsu, Wuxi | KaiYu (WeChat: 573210621) | |
| Malaysia | Johor Bahru | Jeep / Watch Mods JB | EmailInstagram |
| Finland | Tampere | Ville Sainio / Kellohuolto SainioWatchmaker | EmailWebsiteInstagramFacebook |
| France | Bretagne | Baxajaun | EmailInstagram |
| France | Toulouse | Billy Bichon / BBMOD | EmailWebsiteInstagramFacebook |
| Germany | Bavaria, Rosenheim | Bruno | EmailWebsite |
| Italy | Marche | Marco Perticarà | EmailInstagram |
| Norway | Oslo | Hermann / HammerMods | EmailInstagram |
| Norway | Oslo | Truls Havre / Mods.by.TH | EmailInstagram |
| Norway | Stavanger | Johannes / LeiteMods | EmailInstagram |
| Philippines | Makati | Gerald / The Photo Watch Guy | EmailInstagramFacebook |
| Poland | Chris / Raker Custom Watches | EmailWebsiteInstagramFacebook | |
| Singapore | Alex / nafokies | EmailYouTubeInstagram | |
| Singapore | Benson / ModSmith | EmailInstagram | |
| Singapore | Wee Hao / WEEZ.COL | EmailInstagram | |
| Spain | Madrid | Oscar Lainz | EmailInstagram |
| Thailand | Bangkok | Warunthorn / Dark Side Watch | EmailFacebook |
| United Kingdom | Birmingham | Paul / Tempus Watch Mods | EmailWebsiteInstagramFacebook |
| United Kingdom | Bristol | Dan Parsons / Drayton Watches | EmailInstagram |
| United Kingdom | Cornwall | Mike / Wellingtime | EmailWebsiteInstagramFacebook |
| United Kingdom | Hove | Ben / CS Watches | EmailWebsiteInstagram |
| United Kingdom | Northampton | Iain / allthetimemods | EmailInstagram |
| United States | California, Orange | Nathan / 4:44PM | EmailWebsiteYouTubeInstagram |
| United States | California, Ross | Jim Calhoun / NEXTSEIKO | EmailWebsiteFacebook |
| United States | Delaware, Wilmington | Hopen / Hypogean Watches | EmailWebsiteInstagram |
| United States | Indiana, Kokomo | Jason Samm / Kokomo Watch CompanyWatchmaker | EmailWebsiteYouTubeInstagramFacebook |
| United States | Missouri, Kansas City | Ryan / Right On Time Watches | EmailWebsite |
| United States | New York | Eric / LumeShot | EmailYouTubeInstagram |
| United States | Oklahoma, Bartlesville | Cooper / Watchdog Supply Co. | EmailWebsiteInstagram |
| United States | Texas, Austin | Thomas Doan | |
| United States | Texas, McKinney | Eric Wilson | EmailWebsiteInstagramFacebook |
| United States | Texas | Rick / Hot Oil WatchsmithWatchmaker | EmailInstagramFacebook |
| United States | Washington, Bellevue | Darak / Darak Watches | EmailYouTubeInstagramFacebook |
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