I have about 40 or 50 of these jars that I picked up on craigslist last
year.....they are all identical, they say ATLAS and MASON....and they hold 1
1/2 cups, and they look like new, definately not from 50's .....The person
who sold them to me said they contained some kind of spagetti sauce....but i
don't remember the name.....I like them....they are good size for salsa.