Mar 31, 2020 #11 R Raypadua Well-Known Member May 6, 2018 125 18 Winnipeg yacorie said: In Redbook 12 it starts on page 494. The date range is bolder and underlined and then you just look for the patent dates on the insert or lid. the jar numbers for those lids are listed to the right Click to expand... Awesome, thanks!!!