Neighbor gave me this blank he had sitting on the side of his house to shape for him. He seemed to think it was Clark foam but I'm inclined to say it's US BLANKS.
looks to be 73A with QC by "JUS". Anyone recall that name "JUS"?
I looked at the old Clark catalog and the dims on their 73a don't match this at all, but it's way thicker than the 73a of today. It was over 3 1/2 when I measured it, but also thrown off by the blue density indictator.