What is a vintage Bear bow?
The correct usage of the word "vintage" is when identifying the year when a wine was made.
Since the term has been hijacked and used for other items like Bear bows, it's rather meaningless and can pretty much be used the way anyone wishes.
Personally, I just refer to this as "Grayling Era" Bear bows or "Pre-Gainesville".
Now antique is another term often used and abused also, but I would not use this term unless referring to a really old, old, Bear bow that's best hung on a wall or displayed.