OK, I'm going to try and show pictures of the 1951 Centennial FW I just got and I took some pics of the stitches so you could see what I was talking about. Pics aren't the best, but I work with what I have. Fabric is out of focus, but it's the best I could get. The stitches in the foreground is the back.
I have the fabric folded over so you can see stitches from both sides. See how on the back they look fine and the front, not so much.
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