I think i know the white one
The lack of love for these dials at the time made the Swedish Omega Agent (not confirmed but most likely) buy a lot of Ranchero (probaly cheap) and provide them with a Seamaster dial instead.
Those are the transformed Ranchero's here is a 2990 and a 2996
[URL=http://s1200.photobucket.com/user/omegatdn/media/Omega%20Ranchero%202990-1/P1060035_zps4e451551.jpg.html][/URL]
[URL=http://s1200.photobucket.com/user/omegatdn/media/Omega%20Ranchero%202990-1/P1060051_zpsa55c0394.jpg.html][/URL]
[URL=http://s1200.photobucket.com/user/omegatdn/media/Transformed%20Ranchero/2670001_zpsf5fa456c.jpg.html][/URL]
[URL=http://s1200.photobucket.com/user/omegatdn/media/Omega%20Ranchero%202996/P1050027_zpse8a5c73c.jpg.html][/URL]
[URL=http://s1200.photobucket.com/user/omegatdn/media/Omega%20Ranchero%202996/P1050041_zps86a648b5.jpg.html][/URL]
[URL=http://s1200.photobucket.com/user/omegatdn/media/Transformed%20Ranchero/2840001_zpsa04a8d76.jpg.html][/URL]