DALLAS, TX.- Heritage Auctions' Aug. 27-28 Sports Collectibles Platinum Night Auction – the first to conclude entirely in online Extended Bidding format – is anticipated to record the highest sales tally of any 21st century sports collectibles auction when it closes to expectations of more than $10 million in total sales Aug. 27-28 on HA.com.

"With every world record price we record, the calls from top collectors increase," said Chris Ivy, Director of Heritage Sports Collectibles. "We have literally dozens of six-figure lots on offer as a result."

Elite trading cards figure heavily into that tally, with multiple high-grade examples of the most coveted post-war card of them all, the 1952 Topps Mickey Mantle ($200,000+), leading the charge. Also on offer is a spectacular PSA NM 7 example of the 1916 M101-5 Babe Ruth rookie (est. $600,000+) and the only Gem Mint 10 examples of Topps rookie cards for Pete Rose, Nolan Ryan and Lew Alcindor (Kareem-Abdul Jabbar).

The Charles Conlon Photographic Archive headlines the memorabilia offerings in the two-day event, with over 7.000 original one-of-a-kind negatives capturing legends from Babe Ruth to Ty Cobb to "Shoeless Joe" Jackson (est. $1 million). (Exclusive Video on the Charles Conlon archive).

It is the most significant baseball photographic archive ever offered at auction. Other historic offerings include the only game used bat that can be definitively dated to Jackie Robinson's 1947 rookie campaign ($300,000+), and the very last cap ever worn by Babe Ruth as a player ($150,000+). Heritage will also offer the only known photo-matched jersey from the Hall of Fame career of Christy Mathewson ($400,000+).

Two special collections are worthy of note as well. The estate of recently departed legend Ernie Banks provides a selection of personal relics including his Hall of Fame induction ring ($100,000+) and his 1958 "Babe Ruth Sultan of Swat Award" Crown (est. $150,000+), plus an extraordinary assembly of material from various Baseball World Tours, including one of only two known Herb Pennock game worn jerseys in private hands (est. $60,000+).

For collectors concentrating on the modern gridiron, three important Brett Favre jerseys are on offer, deriving from his last game as a representative of the Green Bay Packers, the last game of his fabled consecutive games streak, and the last jersey of his NFL playing career.

Additional highlights include, but are not limited to:

Player's personal keepsakes:

· The 1927 New York Yankees World Championship Ring Presented to Herb Pennock – the Hall of Famer considered one of the greatest left-handed pitchers of all time ($100,000+).

· A time capsule from 'The Father of Black Baseball' - more than 100 items pertaining to Rube Foster, an extraordinary archive including rare photographs, a partial autograph, and a ledger documenting the earliest years of the Negro National League. (est. $40,000+).

· 1974 Pittsburgh Steelers Super Bowl IX Ring Presented to "Mean Joe" Greene (est. $40,000+).

A stellar line-up of signed balls:

· The 1930 Babe Ruth Single Signed Baseball Hit for First Home Run of Season – his 517th career home run – PSA/DNA NM-MT 8 (est. $60,000+).

· A rare, 1963 President John F. Kennedy Single Signed Opening Day First Pitch Baseball (est. $40,000+).

The hobby's Hall of Fame of cards:

· 1953 Topps Willie Mays #244 PSA Gem Mint 10 (est. $800,000+).

· 1938 Goudey Joe DiMaggio #250 PSA Mint 9 (est. $400,000+).

· 1956 Topps Mickey Mantle, Gray Back #135 PSA Gem Mint 10 (est. $400,000+).

· A rare, signed T206 Ty Cobb Bat Off Shoulder Card, dated to 1909-11 (est. $10,000+).

Match and game-worn gems:

· 1980 Roberto Duran Fight Worn Trunks from Sugar Ray Leonard II "No Mas"Bout (est. $60,000+).

· 1947 Maurice Richard NHL Inaugural All-Star Game Worn Jersey – from the first-ever National Hockey League All-Star Game (est. $40,000+).

· 1974 Gordie Howe Summit Series Game Worn Team Canada Jersey (est. $40,000+).