www.preparedfoods.com/articles/114741-tillamooks-oldest-cheddar-to-date

Tillamook's Oldest Cheddar to Date
Four-Year Vintage Extra Sharp White Cheddar is now available
December 9, 2014
Tillamook County Creamery Association, Tillamook, Ore., produced what is said to be its oldest cheddar to date.
Each block of the 4-Year Vintage Extra Sharp White Cheddar on your radar was naturally aged over four years to achieve a creamy, crumbly texture with larger, more developed tyrosine crystals and sharp flavor.
An 18-ounce block boasts a suggested retail price of $7.29.