I have Fluke ads that show up until at least 1988 March 1991 (for the 70 series, 80 series had yellow holster by then) they still used the gray charcoal holster with either a yellow or black meter. So I'm curious to know when Fluke switched to the yellow holster and dark meter "look", and if any meter before that used it. From memory I think there were. There were plenty of yellow no-name meters before that date, so yellow was a common colour at the time.
Of course "trade dress" issues like this one (it is NOT a trademark issue as such) aren't a "prior art" thing, but it would establish if Fluke are being bigger dicks than they already are.
Can anyone find a 1980's vintage meter with a yellow holster (or surround) and dark meter?
I foolishly through out all my old catalogs, and few of the magazine ads are in colour at that time.