Geometric op art purple and blue table placemats made in Denmark 1970s

These four tablemats were made in Denmark in the 1970s and measure approximately 32.5 x 46 cm. They are in very good vintage condition with minor wear and are offered together as a single set. The geometric op art design is woven into the manmade textile (which we guess to be polypropylene) so appears on both front and reverse sides. They have no producer labels, but similar placemats we've found in Denmark from the same period were made by Georg Jensen Damask.