When used as a noun vintage is really a term that defines the class of a dated object with reference to era of production or use: a drum could be of last year's vintage.
That's loosly from www.dictionary.com
So your Ford truck is a truck of 80's vintage... mine was vintage 1976 before it suffered an unfortunate fate. Dang. 4x4 F100 360 motor 4 speed with a creeper and factory dual exhaust.. I loved that truck. (sorry I digress)
So vintage in that context is really anything... a new drum would be vintage 2010...
As an adjective the word gets much more interesting:
1. representing the high quality of a past time: vintage cars; vintage drums.
2. old-fashioned or obsolete
3. being the best of its kind: They praised the solo on the Carson show as vintage Buddy.
It is interesting to see that almost all formal collecting organizations have clearly defined limits to "vintage" as an adjective.
For my frame of reference and age... I consider pre-70's as vintage. 70-80's modern era.... 90's+ feels like new stuff.. but that is just my frame of reference.
:2Cents: