I really appreciate Elven trying to pin all this down.
As a practical matter, unfortunately it's only art and antique dealers who are likely to use the proper terminology for "old" stuff.
People say "antique" all the time, meaning "made before I was born."
And "vintage" seems to be a totally vague word. I think it was orginally adopted, like the car salesman's "pre-owned," as a highbrow-sounding synonym for "used." "Used" evokes someone else's feet in the thrift shop shoes, someone else driving the car into the ground before you buy it, some else's fingerprints on the cards. A lot of people believe that NEW and UNUSED is better. Social snobbery, in my opinion, just my opinion and I'm sticking with it
But "vintage"! Now THERE'S a word! Like a fine wine, a vintage object, perhaps not a real antique but gosh, so classy-sounding!
Professional art and antique dealers, they are legally bound not to misrepresent their items, and terminology is important to them for that reason. Your average E-bay Ed or Edna--what do they care.