Hello Jody,
Welcome to Tnet & thanks for bringing the nice jars. It looks like you have others hovering in the wings, which I hope to see, too
The Hero Masons on the right has the Maltese Cross in whose arms are the letters "HFJCo.," which was the Hero Fruit Jar Co.
"H.F.J.CO…………….Letters are placed in the four arms of a cross (similar to a formée or Maltese cross) which appears on fruit jars with the “Mason’s / Patent/ Nov 30TH /1858″ embossing. Hero Fruit Jar Works, Philadelphia, Pennsylvania (1883-1908). Hero subcontracted some of their jar orders out to other glass companies, such as Findlay Bottle Company, Findlay, Ohio (1888-1893); Marion Fruit Jar & Bottle Company, Marion, Indiana (1888-1904); and Cumberland Glass Mnfg. Company, Bridgeton, New Jersey (1870-1900), so there is a possibility that any individual jar could have been made at one of those other factories. Please see entry on “Mason’s Patented Nov 30th 1858″ fruit jars on page three."
GLASS MANUFACTURERS' MARKS ON BOTTLES & OTHER GLASSWARE~~ PAGE TWO
For my part, I'd like to see natural light photos of the jars without the lids, the lids themselves, and the bases of the jars.
For the Keystone Mason, I'd ask the same.
Thanks for showing us.