That's a very nice piece for any collection.
I would love get a Mantle signature from the early 50's. They look nothing like what you see everywhere today. They are just so very hard to come by, and when you see them - they go for a good amount.
Currently looking for the following comic Books:
United Comics: 21,22,23,24,26
Tip Top: 173 & 184
Peanuts 1 (1953)
Peanuts: 1-4 (1963-64)