Here you go...
I
technically don't have all the versions. The Mantle one, for example, is the earlier model, missing the (R) logo in the brand above the "Co", which would appear in 1964.
So I am still missing the post '64 Mantle, and the pre-'64 others. Additionally, some of the spline bats have been found with the word "Powerized" instead of "Spline".
And, finally, the little brochure in the frame only lists Mantle, Robinson, and Mathews as being available for colleges to order, so I am not sure what that means for my Berra '64 model. The brochure is selling them to teams other than MLB/Minor Leagues for the first time at that point (dated November 1963, for limited sale to colleges in 1964). So, if you have an earlier one, like the Mantle, it was almost certainly either in the MLB spring training or some minor leagues. I have read that they made it into real games, but I have seen ZERO proof of that, and Keyman points out that they might be illegal anyway.
But, I think I am close enough.
As you can see from the pictures (especially Berra), the splines did not work very well. But what is interesting is that they worked well enough for LS to bring them to the public for sale, which tells me that someone in the MLB must have liked them?
Anyway, a pretty rare, and relatively affordable bat of some serious players. And hey, you never know, maybe Mantle took a few swings, said "this sucks", and chucked it. The knob on Berra looks like "BB"; so maybe the bat boy used it???
Ok, I lied. Now that I wrote all of that, it is not close enough. Now I want all the versions.
And, I have no idea why it made my picture upside down.