Josher,
The terms 'vintage' 'post vintage thoroughbred'' Modern classic' etc have always been defined ( perhaps less than successfully) by years or periods of manufacture.
This is an inexact science because, inevitably, what is one man's classic isn't another's and some of the so called 'modern classics' weren't that stunning when new, so how has age made them any better?
Perhaps a better way- and the approach this site takes- is to define a 'classic' in something like the way the Oxford English Dictionary defines it: " Classic: of allowed excellence; of the first class". So, what the heck does it matter when a thing was built- if it's good enough then it's a classic! Case rests
Cheers
