Jantz,
I can confirm the backs on the following:
6. Atz - Hoffman - Piedmont 350
7. Hoblitzell - Stephens - Piedmont 350
8. Abbaticchio(Brown) - Cicotte - Piedmont 350
14. McElveen - Dygert - Piedmont 350
And I also own a McGlynn - Jones (Detroit) - Sweet Caporal 350/30
Tom,
I'd love to see a scan of your Engle/Phillippe. The only one I've seen is this one:
