Jim â€” Most interesting. Richardson's name for this ware, "Tartan", is new to me. It is pleasing to see that it matches the registration particulars so well (Gulliver p.264 / Thompson supplement p.29). Was the mark acid-stamped or handwritten? ... and does "Tartan" appear as TARTAN
As for the pinchwork feet, I have tried to see them with an applied trail around the edge, but I can't, at least not in your photographs. They look to me just like thick pinchwork, deeply impressed with the half daisy or scallop pattern. I've noted the seven petals for future reference. What is the width of each impression?