[Seiko] fixed up my friend's 5T52 World Timer! : Watches
The World of Worldtimer Watches – Forbes
WorldTimer is listed in Miscellaneous Tools category and made available by Castle Software Ltd for Windows.
How to tell when your Seiko watch was made (Part 1) Posted by Quartzimodo Admin.
Free downloads of trial versions of Castle's software – Castle Software
Edox Class 1 GMT Worldtimer Men's Automatic Watch 93005-3-nin