[Tools]

During the transition years 1998-2000, Dials were marked "Swiss" until Rolex finally settled on "Swiss Made" for Luminova dials.

Very early Radium dials were also marked "Swiss" until radium was outlawed in ~1960.

Rolex also continued using "Swiss" dials for several years as Service Replacements after 2000..

So, looking at a serial number that should be 1996, but we find it with a "Swiss" dial; would indicate a service replacement and not a "transitional"; likewise, models with "Swiss" dials that have serial numbers later than 2001 would very likely have had a service dial replacement at some point until that stock of dials was depleted..

Service Dials have been seen with some differences from original equipment dials, so I don't think that there is any evidence that a particular dial would stop being produced completely just because the stock of those with "Swiss" on them ran out.... However, at some point they would, indeed, no longer produce a particular replacement dial.