Uncommon Postcard of Rocky Marciano Promoting Sunnyhurst Dairy Products. Lot 570. Uncommon Postcard of Rocky Marciano Promoting Sunnyhurst Dairy Products. The undefeated heavyweight champion wears a t-shirt from the Massachusetts dairy. A number in pencil and some fingerprints on the back; ex-m front. Winning Bid $50. Back to List Winning Bid $50 Back to List