Modern to antique.

[Big J]

Antique = bike was produced more than 12 months ago and has any amount of rust on it.
Classic = bike resembles a bike that any Google image search will show.
Rare = seller's brother/friend told him he has never seen one.
Used = bicycle has been driven over by an automobile at least one time.
Vintage = similar to "antique" above but seller saw one on Google.

This, just haha funny. Hehe.

 

[Big J]

Prewar should extend to 1942 for US made.

Prewar should extend to 1942 for US made bikes.

I can agree with this.

 

[Miq]

There are also plenty of American wartime bikes (1942-1945) with their own unique characteristics.

 

[Frank & Pam (SKIDKINGS)]

 

[Big J]

There are also plenty of American wartime bikes (1942-1945) with their own unique characteristics.

True, I did forget that.

 

[MrColumbia]

Dictionary meaning of vintage;

Representing the high quality of a past time. this is referenced for movies, cars and the like. All others are linked to wine.