NEW YORK (AP) — The Upper Deck Co. has made a pitch to buy The Topps Co., a bid that would join two iconic baseball card makers that have sold sports memorabilia to generations of fans young and old.

The offer price of $10.75 a share trumps a bid earlier this year from a group of investors led by former Disney CEO Michael Eisner. Topps, maker of baseball cards and Bazooka bubble gum, said Thursday it was not sure Upper Deck's bid is a superior offer.

Eisner's Tornante Co. LLC and the Chicago-based private equity firm Madison Dearborn Partners LLC had agreed to pay $9.75 a share, which represented a premium of 9.4 percent when they first made the offer in early March. That deal received regulatory approval on April 3 and has been scheduled for a shareholder vote on June 28.

The group led by Eisner agreed to let New York-based Topps negotiate with Upper Deck, which is in Carlsbad, Calif.

Topps, founded in 1938, makes trading cards that feature athletes of Major League Baseball, the NFL and NBA. In addition to Bazooka bubble gum, it owns the Ring Pop and Push Pop brands and makes sticker album collections.