Damaris, I know what you are talking about, I have one from years ago, just do not know where it is a the present time. I know it is in one of the many boxes around here. Also I do not know who made it, or where I got it. (That was in the late 80's). We used it to add 1/4" seam allowance when drawing the design on the fabric, before cutting it out.
Margarita in Auburn, CA