Vintage = 20 years or older... so 1996 fits the bill. I'm vintage enough myself to remember buying those watches when they were new.
I guess I get funny about horological definitions, although "vintage" doesn't have a set date(unlike antique, which is 100 years old) at least in watch collecting circles.
I struggle with calling 80s and 90s watches vintage for a couple of reasons. One of them is sitting on my wrist now-my daily wear watch was made in the early 1980s, and I could go today and buy a NEARLY identical one...the differences in a new one vs. the one I'm wearing are subtle. The brand new one uses a sapphire crystal vs. the acrylic crystal on mine, has some subtle changes in the dial is printing, splashes the brand name on the inside of the bezel(that aren't that visible) and uses solid 18K links in the center portion of the bracelet rather than the hollow rolled 18K "tubes" on mine. Only sapphire crystal(although I have a love/hate relationship with acrylic) and the solid links would be considered an upgrade over my watch-the solid links address a well-known problem of the bracelet "stretching" in use(although the stretch has more to do with dirty bracelets being worn loosely-after three years of continuous wear with the watch "tight" on my wrist and frequent cleaning I don't have any perceptible stretch). The newer watch has a different movement, but the big advantage of the newer one is to make servicing easier-the newer ones are no more accurate than a properly serviced old one(mine was off 5 seconds when I adjusted to DST, and I hadn't touched it since November). BTW, there is a "large" model sold under the same name, but the "large" version only 40mm-the classic 36mm is still available.
I wore a Hamilton from the early 1950s a couple of days last week-THAT is a vintage watch and I got a lot of comments on it.
EDIT:
To show what I'm talking about with my daily wear watch:
https://www.rolex.com/watches/datejust/m126233-0017.html
BTW, there are so many variations of the Datejust that it took me a long time to find a directly comparable reference #, as the old reference 16013 is long gone.