DALLAS — Heritage knocked another record for sports memorabilia out of the park with their Summer Platinum Night Sports Auction on August 27 and 28, the shooting star being a 1952 Topps Mickey Mantle #311 Mint+ 9.5 baseball card that sold for $12.6 million, adding to the sale’s overall total of $39,183,299. The card was found in 1985 by Al Rosen, known in the industry as “Mr Mint,” when he received a call from a suburban Boston seller whose father had been a delivery driver for the Topps company. Although many of the print run of these cards were believed to be destroyed, this man had a full run in mint condition that his father had salvaged. The discovery was nothing short of a miracle, and this Mickey Mantle card was the best of its kind out of 75 in the seller’s collection. After changing hands a few times and selling for $50,000 in 1991 to an anonymous buyer, this “finest known example” reappeared to sell as the most valuable sports collectible to date. Heritage updated the card’s description to add that Emmy Award-winner director and producer Dan Klein is creating a documentary about the film with the working title Four Perfect Corners. Prices given as reported by the auction house. For information, 214-528-3500 or www.ha.com.