The best way to verify your Limoges is to add a photo here of the piece/pattern and all marks on the back of one piece. There were hundreds of porcelain factories over the years that were in Limoges, France, so the marks will tell the story of age, place and value. You can load photos by using the ADD FILES button in the lower right of your screen.
Yes, there was American Limoges made in Sebring, Ohio.
Yes, very much so. It is about 1/4 of the value. It was inferior for even American china because of the type of clay.
Here is a link to history and some marks so that you can compare.
I do hope that the website for the AMerican limoges helped you.
I do hope that all helped.
Please click the stars (all five would be great!) to rate me.