Welcome to the boards. Make sure when purchasing high grade 1955 Topps All-American football cards that they are not sold through PWCC. Their friend Gary Moser loves to trim that set and still get them graded in PSA holders. Please read up on the threads that Peter has been making about the tainted submissions, or read the threads over on Blowout.
Here are some Certs that are probably trimmed/altered:
24333553 1955 TOPPS ALL-AMER. 37 JIM THORPE EX-MT 6
22243971 1955 TOPPS ALL-AMER. 68 THE FOUR HORSEMEN EX 5
21227879 1955 TOPPS ALL-AMER. FOOTBALL CARDS #68 THE FOUR HORSEMEN EX 5
19606433 1955 TOPPS ALL-AMER. FOOTBALL CARDS #68 THE FOUR HORSEMEN NM-MT 8
18697101 1955 TOPPS ALL-AMER. FOOTBALL CARDS #27 RED GRANGE NM 7
28151609 1955 TOPPS ALL-AMER. 97 DON HUTSON EX 5 11/22/2017 $204.37 eBay (pwcc_auctions) 401440825641
28639895 1955 TOPPS ALL-AMER. 6 NILES KINNICK NM 7 1/1/2018 $90.00 Sirius Sports Auctions 781
27408817 1955 TOPPS ALL-AMER. 21 WHIZZER WHITE CORRECT BIO NM-MT 8 8/23/2017 $172.50 eBay (pwcc_auctions) 142475570977
27408818 1955 TOPPS ALL-AMER. 26 LARRY KELLEY MINT 9 8/23/2017 $317.00 eBay (pwcc_auctions) 401383896023
27408819 1955 TOPPS ALL-AMER. 16 KNUTE ROCKNE NM 7 8/23/2017 $212.78 eBay (pwcc_auctions) 401383895996
27408820 1955 TOPPS ALL-AMER. 68 THE FOUR HORSEMEN EX-MT 6 8/23/2017 $248.50 eBay (pwcc_auctions) 401383896971
40814434 1955 TOPPS ALL-AMER. 68 THE FOUR HORSEMEN MINT 9 7/22/2018 $3,800.00 eBay (pwcc_auctions) 401566769288
27755472 1955 Topps All-American Herman Hickman ROOKIE RC #1 PSA 9 MINT (PWCC) 10/23/2017 142538424237
https://www.blowoutforums.com/showthread.php?t=1299033