Letters?

Well, I'm back from Sutton Hoo. The weather has been miserable today, but you'll be glad to know that I didn't come back empty handed!

l found a sheet of paper with some letters and numbers on. l'll upload a picture as soon as l can, but for now here's a description;

CT P HPC F W A
1939, 10-10, 93 : R41

That's what it said. There were some colours too, but you'll see them when I upload the picture... if you gyys haven't figured out the clue already by then of course!

Good luck...