Your jar is a jelly jar from the turn of the 20th. century.It used a clap down tin lid.IThe jar has turned sun-color purple thru age.This is because of amisyst added to the glass batch to turn the glass clear!Is it a jelly jar?
Is there a way to tell how old?
The newest stuff around it was early 30's.
Never mind about the meat jars. There were lots of other jars used to pack potted meat, etc but I don't think these were specifically intended for that purpose. Those were jelly jars, and probably used for other products too.Don't quote me on this, but I think I have read somewhere that some (or all) of these kinds of patented jars with the "stepped" rim were originally filled with a meat product, such as "potted meat", "meat paste", sliced cured meat or bacon of some type. They were often saved and reused as jelly glasses or jelly jars.
There are still jars made today (they don't look anything like that), but, for instance, products from Armour Meats.
If someone has better info on this, please post it!