While I was looking for pictures of Vern Handrahan (even with good Vault images, I always check because you never know), I came across these Reggie Jackson images on the
"Game Used" memorabilia site. You've probably seen them before, but I hadn't and they don't turn up on a site search. They're both from 1967. The first is a minor league image when Jackson was with the Birmingham A's. The second is a newspaper article from June 1967, after Jackson was called up. Though the latter is of little to no use because of its size and angle, there is a KC on his cap (that you can't quite see) and he's wearing #31. You know, for whatever its worth.