Wilson K-98 Vintage golf balls For offer is a brand new, unopened sleeve of three, Wilson K-98 golf balls. Look at that dimple pattern - very different from the modern balls. I believe these balls date back to the mid 1970's. Wilson released their k-98 irons around that time, so I'm assuming the balls would be released around the same time period. Whether you want these for your collection, or to play them in vintage golf, or just see what a 1970's ball is like to hit, here's your chance to pick some up.