I have a covered dish that was inherited from my mother-in-law who thought it came from the Chicago World’s Fair (1893). The mark on the bottom shows J.P. over a horizontal line with L below it. The mark is blue, not red. There is no “France” stamped on it. I have not been able to identify the pattern or find any other information on this piece. Can anyone help? I have tried 8 times to upload a photo after resizing and compressing the jpg file, but the photo still will not load.