OK, I'll play. Vintage in any context except describing the year a particularly good batch of wine was laid down. Calling a bass, car, etc vintage is silly, especially when everything over 6 months old these days is touted as such. There are exceptions to this, like Triumph motorcycles. Throughout their production history they have had good years bad years, outstanding years and boat anchor years of production. If you have a twin made in the Devil's Arrow era you can claim vintage status for it, if OTOH you have any Triumph built during the transition from Whitworth to Imperial when they were a random mixture of both thread types, not so much.