Just as Eskimos distinguish between a dozen different sorts of snow, the Swiss appreciate a wide range of Gruyères: young Gruyère, aged Gruyère, mountain Gruyère, summer Gruyère, winter Gruyère, Gruyère from small village cheesemakers, Gruyère from large commercial dairies. Depending upon season, source and age, the flavor and texture of the cheeses are significantly altered.
Seventy-pound wheels are aged for over a year (at least six months longer than standard issue Gruyère), hence the term "antique." The extra aging gives this Alpine cheese an exceptionally full flavor.
Imagine the flavor of the Gruyère you know now but ten times more delicious and infinitely more interesting. Smooth, with the spiciness of a great Rhine wine. It's got an incredible nose and a dry, yet creamy on the tongue texture.