1947 Sports Exchange Joe Jackson. Graded PSA EX-MT 6. This is the ONLY example of this card graded at this level by PSA, with just one graded higher. It is also one of just five listed in the PSA Population Report. These cards were issued by "The Trading Post," an early hobby publication, in the form of uncut sheets. Each sheet featured six cards and they were meant to be hand cut by collectors. Jackson is one of the keys to the set and graded examples, as noted by the PSA Population Report, are rare. This is an outstanding, high-grade example of this seldom-seen Joe Jackson card.