Wilson Sporting Goods Co. Championship, Extra Duty Felt mCat 251.163.18.3 Item made for use in The United States Type 18 - Pull-tab Metal Can Circa 1970s For sale is a ?Rare? (UNOPENED) vintage canister of Wilson Championship tennis balls. The plastic lid has a sticker across the top possibly a manufacturer or store label. The canister does show signs of wear; scratches, a few small dents. I so not see any rust on the canister.