(Baltimore, Maryland) -- The century-old rare baseball cards everyone in the hobby is talking about -- the treasure trove of 1910-era E98 cards discovered in an Ohio house attic -- will be displayed by Professional Sports Authenticator (www.PSAcard.com) through the courtesy of Heritage Auctions (www.HA.com) at the National Sports Collectors Convention in Baltimore, August 1 - 5, 2012.

Nearly all of the more than 700 cards in the "Black Swamp Find" will be publicly exhibited for the first time anywhere by PSA at booth #A4.

Heritage will offer 37 of the finest cards in a public auction (Platinum Night) in Baltimore and online, August 2.

Heritage also has created a limited edition four-player set of E98 souvenir reprints that are encapsulated by PSA with a special insert label. The cards will be available free, one-player-per-day while quantities last at the Heritage booth, #A1.

The players in the reprint set and the day they'll be distributed are: Connie Mack, Thursday, August 2 Honus Wagner, Friday, August 3 Ty Cobb, Saturday, August 4 Cy Young, Sunday, August 5

"The reaction from the collecting community has been outstanding for this Black Swamp Find commemorative promotion. We expect that many collectors will be clamoring to get their hands on one of each example," said Chris Ivy Heritage's Director of Sports Auctions.

There has been extensive nationwide news coverage about the discovery of the cards that are estimated by Heritage to be worth a combined total of up to $3 million or more.

The cards apparently were originally acquired in 1910 for promotional purposes by Carl Hench, a German immigrant who owned a meat market in Defiance, Ohio. His heirs were cleaning their late grandfather's house when they found the cards in a box under an old doll house in the attic.

"In terms of how this will impact the collecting market, it can be argued that this is the most significant find of vintage baseball cards ever reported when you evaluate the find in context," said Joe Orlando, PSA President and editor of Sports Market Report monthly price guide magazine.

A feature story about the discovery is in the August issue of the magazine. Thousands of free copies will be handed out at the National.

Heritage Auctions nicknamed the discovery "The Black Swamp Find" in reference to the Great Black Swamp that helped protect Ohio's Fort Defiance during the 1790's Northwest Indian War. To identify and preserve their pedigree, the PSA holders for these E98 cards are specially labeled, "The Black Swamp Find."

PSA will also display a comprehensive collection of 1909 - 1911 T206 tobacco advertising backs, including some of the scarcest backs known. Courtesy of David Hall, this unprecedented exhibit also includes authentic examples of tobacco products from the period that are directly associated with the advertising on the cards, such as Piedmont and Sweet Caporal. At the center of the display will be the extremely scarce Ty Cobb portrait with Ty Cobb tobacco back card, accompanied by the finest Ty Cobb tobacco tin known.

Since its founding in 1991, Professional Sports Authenticator (PSA) experts have examined and certified over 19 million different sports, entertainment and historical collectibles with a combined total value of over $1 billion.

For additional information, contact PSA/DNA Authentication Services at (800) 325-1121. Email: [email protected]. Online: www.psacard.com.