RARE Vintage Wagon Trail Creamy Imitation Peanut Butter Ball Jar 2LB

Description

Rare Vintage Wagon Trail Creamy Imitation Peanut Butter Empty Jar 2LB.
What makes this jar rare is that it's "imitation" peanut butter.  What was that made of before ingredient lists were manditory?
Label is ripped and worn but you can still see the description as well as the Wagon Train logo and illustration.
This is also a Ball jar.  The logo is on the bottom.
The jar had to have been produced from at the least 1963 when 5 digit zip codes were introduced.
Madison Foods, Waukesha, Wis. 53186