Looks like it could be. They are highly prized apparently because I get out bid everytime on ebay. When you find one for sale it is almost always to high for my budget. They must have made millions but I can't seem to get one.
When you can you leave a half inch head space at the top of the jar.
That isn't an immerser for pickles.
Why would you want to push them down that far?
No.... I think it is a jelly jar.