No PSA 9s or 10s exist of the 1948 Leaf Bob Feller; just six 8s. If one graded higher, it would shake the hobby.
Post War Cards

Heritage Auctions Offers a PSA 9 1948 Bowman George Mikan: A Look at All Four 9s and the Lone PSA 10
Only five PSA 9 or better 1948 Bowman George Mikan rookies exist. Here's a scan-by-scan look, with sales history and comparisons.
Mark Murphy, the "hobby's premier unopened pack specialist", shared sharp advice on spotting fake wax packs long before BBCE dominated the scene.
A surprising 1965 Topps Baseball box topper surfaced a few years ago, promoting the elusive “press-on” transfers from Series 6.
A 1957 Topps Salesman Sample strip with a Don Drysdale back and early checklist numbering was recently listed on eBay.
An excellent piece for the Fall 1983 issue of Baseball Cards Magazine about 1958's rare regional baseball cards.
After Heritage sold a signed 1953 Roger Maras card for $22,570, I found a few other related Fargo-Moorhead Twins collectibles and past sales.