While the blocks look lovely and are a fabulous find, I will warn you that the person who constructed them probably didn’t realize what size triangle was needed for the outside triangles on each block. She probably started with a block the same size as the ones that would remain square, then cut it in half on the diagonal and attached it. The problem is that a larger triangle is actually needed so that there is a seam allowance around the outside.
I suspect this because my Grandmother’s aunt made a quilt top with the same issue. The pattern was different, however, so the only “setting” triangles on my Aunt’s quilt were around the edge of the quilt top. The top sat for decades, including after I inherited it. I knew if I didn’t remove and replace all those hand pieced triangles, all the points would be cut off when I bound the quilt. I finally decided that quilted and useable was better than perfect points and finished my Aunt Edith’s quilt, almost 60 years after she passed.