On this block the seams are still narrow, again, probably pieced on a treadle machine. Only the 2 large triangles closest to the camera are pieced to get a big triangle. She used a 2.5" square, and added a triangle on 2 of the sides..pretty clever. Looking at this side, you can see tht if you had an album patch block, you could acchieve a T block by adding this type of lattice to each block...I find that very clever also.