Not sure if this exact, but as I recall, from discussions long ago,
Under 10 yrs old = Modern
10 - 20 yrs old = Post Classic
20 - 30 yrs old = Classic
30 - 40 yrs old = Vintage
40 - 60 yrs old = Antique
60 - 80 yrs old = Historic
80+ yrs = Museum piece
It does not matter whether it's a bike, car, or spoons.
It's a generational thing.
It's also flexable as the time gaps often change with different generations.

Some will consider Di-2's, classic, 30 yrs from now.

So yea, you got a Classic.