Who Makes Costco's Sold Out Golf Ball?

With well received production values, a silly-low price that has them sold out and the ability to upset the golf-ball-sales-cart, Costco's Kirkland golf ball has to be made by someone with some golf knowledge?

Golf.com's Michael Chwasky did some homework and discovered...

They buy it -- in this case from a ball manufacturer in South Korea called Nassau Golf Co LTD. Though we haven't been able to reach anyone at Nassau, the Costco site (which states clearly that product details come directly from the manufacturer) describes the four-piece construction as consisting of a large, soft core, speed boosting outer core, super fast mantle, and soft urethane cover. The design as described aligns perfectly with what could be considered a generic Tour ball construction that, if properly manufactured, should perform well.