This is the fabled T-206 Honus Wagner card from 1909-1911 that sold in 2007 for a world-record $2.8 million. The card was certified at Near Mint/Mint 8 by BILL HUGHES, who was the OFFICIAL GRADER for PSA at the time of the grading of this, the most important baseball card in the hobby!
(Bill Hughes graded this famous card, but did not own it and was not the seller of the card.)