Yeah I'm seeing light blue rather than purple as well, but I can see how it could come across as purple. And I agree on the lip being too finely ground. It's unfortunate how good the reproductions on these jars are.
I still love it as it has good cobalt color. The lip does have a funky looking grind on the lip, but what do I know I don't collect jars. Question is do you like it? Collect what you like. Like what you collect.
There is absolutely no doubt that it is a repro. Any colored Mason's patent jar with a cross on the back is a fake.
The one exception would be the midget pint size. Which I think is listed in amber. And possibly a few other colors other that aqua. But I don't have my Red Book handy to verify that. Of course there are real cobalt blue Mason's 1858 jars. But they are obviously extremely rare. And sell in the five figure range. And not a one of them have a cross on the back. There have been a lot of repro Mason's 1858 jars produced over the years. Beginning with the dream color
series from the 1970's. I'm sure someone is producing some form of fake 1858 jars to this day.
Looks like the base is blank on this one but hard to tell from the photos. A number of the repros are blank, but if it did have mold numbers, those are pretty well documented as to which ones are reproductions.
They really tried to make the lip of the jar look ground. Sanded i would guess. The bottom looks like it has no wear at all. It should have some. Look at the wear on the bottom of this masons 8 pat jar in this picture.
ROBBYBOBBY64.