Well, I just had an eye-opening experience. I'm shopping secondhand market (Facebook Marketplace, Mercari, Poshmark, e-bay etc) for a piece of carry-on luggage. Some sellers take a photo of the outer tag if available, and/or any inner tags.
I was all set to pull the trigger on a bag on FB Marketplace when I noticed the price tag had dimensions for the bag that will not work with Virgin Atlantic's carry-on rules. These dimensions also differed from what the company's website states for current dimensions.
I called Customer Service and they asked me if there was a certain style number on the bag. I gave it to the rep, and she said this was the first generation of this bag--and hadn't been made since 2015.
I went back to ebay, where I've been watching a couple of these bags. Sure enough, the style number was the same.
I'm a little bummed out. Caveat emptor and all that! I never realized there were different versions of this thing floating around.
Oh well...back to the old drawing board.