Mamaw Smith who resides next door has a pressure cooker that she bought probably in the 1940’s.  It worries hell out of me but she still uses it.  It apparently works just fine as she has used it dozens of times this year for canning our garden green beans, pepper relish, our garden tomatoes, beets and salsa.
 
Please wish us luck.  I think she only pushes it to 15lbs?
Paul E. Smith
Knoxville, TN