Cluny mat
I am not an expert, so I'm not sure aboout this identification! But there are no picots, and there is a Cluny edge. This has tallies, with plaits join things. There is a twisted footside.
This mat is similar to this one.
This piece is too big to fit in my scanner (which is how I am reproducing the lace) so I can only show pieces of it on the right. The entire piece is photographed below to show its shape.
