Found this lamb mason jar has the letter L and the number 11 at the bottom and on the lid it says "Bernardin mason the ideal vacuum seal" smells like gasoline :
Lamb Mason Jar Circa 1930-45 Quart Size With Lid - Etsy | Jar, Mason jars, Antique fruit jar
Atlas mason jars for home canning - Healthy Canning in Partnership with Facebook Group Canning for beginners, safely by the book