I've always heard that 100 years was the rule of thumb for how old something had to be to be a true "antique". But going "antique" shops shows that rule is a lot more flexible than that.
"Vintage" is even more loosey-goosey. Is a machine from the 60's vintage? I'd say so. What about the 70's? Sort of. 80's? I...guess?
I'm from the 70's myself, and I guess I think things older than me are vintage, things younger than me are just "old".
A lot of words to say "I don't really know". LOL