Pat,
That blue mark on the Tannehill looks like a slightly misaligned color pass. Might be difficult to identify. I did find a Lumley that may correspond. I would consider the two potential sheet mates. Haven't had time to look any further. Hope to do so this weekend. Interesting observation on the Marquard/Tenney scratches. I'm sure I would have missed that one. Thanks again for all your efforts. Happy Thanksgiving.