Stumped - unknown mark french?

[second-wind]

I have come across this beautiful tray with an unglazed bottom that has this mark that I have not seen before. If it was not for the mark, I would have thought it an unmarked Jean Pouyat piece.

Any pointers would be appreciated.

Thanks

Martin

[patd3283]

Picture of piece, please.

Patd

[second-wind]

Here is a picture of the tray