ulpilotrmh
Member
Is there any lettering on the bottom or on the heel of the Mason Jars? If so, this might indicate the year of manufacture. This is also true for any glass container you might find including all those sodas in the pic. On those bottles the year manufactured, the factory where it was made, the company trademark and the individual cavity number will be molded into the bottom or sometimes on the heel of the bottle.
Russ Hauser
Russ Hauser