1967 TravelEze, VIN # location?

Hello everyone.
I've got the opportunity to pick up a what i'm told to be a '67 Travel Eze. it's been stored a long, long time but I'm hoping it might be worth the trouble.
my first roadblock is...where in the heck would I find the VIN on this old gal? I know VINs weren't much of a had to have thing until the 80s, all I have to go on is a serial number on the swanky Original Warranty paperwork.
We think it was a park model but the paper trail ends in 1983 and the license plate is long gone to try to search by that.
I've got the opportunity to pick up a what i'm told to be a '67 Travel Eze. it's been stored a long, long time but I'm hoping it might be worth the trouble.
my first roadblock is...where in the heck would I find the VIN on this old gal? I know VINs weren't much of a had to have thing until the 80s, all I have to go on is a serial number on the swanky Original Warranty paperwork.
We think it was a park model but the paper trail ends in 1983 and the license plate is long gone to try to search by that.