Possible canning jar insert

[bottlerocket]

Is this a canning jar lid insert?
I have not run across one like this before.
It is not the typical flat ones I find.
Thanks

 

[bottlerocket]

Top view

 

[MNJars]

Any embossing on it?

 

[bottlerocket]

No embossing at all. I am not sure if it is porcelain or milk glass.

 

[RED Matthews]

I think they are milk glass and I know I have one somewhere up in HY, I think mine had "/ BALL " on it, in the top center. RED Matthews

 

[epackage]

Looks like it could be the bottom for a potlid IMHO...

http://www.ebay.com/itm/colorful-antique-prattware-potlid-base-I-see-you-my-boy-/190394671556?pt=LH_DefaultDomain_0&hash=item2c546821c4

 

[goodman1966]

What's the measurement across. Just a guess,but I've seen a cosmetic jar with that type of lid.

 

[surfaceone]

From.

 

[bottlerocket]

Pot lid or make-up. Both pictures look look they could be like this one. Although It is the identical circumference as a canning jar insert. That's why I leaned toward an insert.
Thanks for the input. I will see if there are more in my dump.

 

[towhead]

Reminds me of the Vintage Glass Carpet/Floor Protectors you would put under the couch feet...Furniture Coasters.....?? Julie