[JoeDfan]

Here is the bat. Picked it up on eBay about a year ago, if I recall correctly. Looks like it originally came from a Mears auction, and they dated it from 1961 -64. They said it wasn't in his personal ordering records, so the use cannot be attributed to him.
I read that Spline bats were test bats sent directly to the teams to experiment with, rare, and not available in stores. So that is pretty neat. I also have a Yogi Berra one.
Currently a wall hanger, but who knows? Maybe I can find a better photo match someday.
This blurry photo is from 1963 (World Series, actually). So the time frame fit. I wasn't actively looking for a match, but when I saw it, of course my imagination starts meandering, so I thought I would get some objective thoughts.