No markings on top or bottom and a porcelain cap inside the over!Can you post images of the base and the top without the lid. See if you can see any company monogram, logo, embossing anywhere because that can help with identifying age.
This website has some info on patent 1858 masons jars
Mason's Patent Nov 30th 1858 fruit jars - General OverviewGeneral Information, history on antique glass "Mason's Patent / Nov 30th 1858" marked fruit / canning jars!! Overview, Background, Summary.glassbottlemarks.com
Thank you so much for the info!! My husband has been searching pretty hard and actually did find that info you had sent above! Was hoping to find more, but I guess this is what we get! Thanks again!!Quoting glassbottlemarks.com
"However, vast quantities were produced by well over 100 different glass factories, and many of those have NO identification marks whatsoever, or only a mold number, letter, or emblem on the base. There are MANY, MANY different mold numbers seen, having one, two, or three digits. In those cases it is difficult, if not virtually impossible, to positively identify the actual glassmaker"
I did find information on the cap though
Boyd's Genuine Porcelain-Lined Cap ~ Milk Glass Jar LinersBoyd's Genuine Porcelain Lined Cap ~ Milk Glass liners for zinc caps, glass lids / antique milk glass inserts, discs ~ Information webpage!glassbottlemarks.com