Wow.
You guys have posted some great stuff.
This is such a difficult question to answer.
I've narrowed it down to 2.
Hand made frame and sig of Lou. Folk art and a nice Lou signature.
1927 type 1 Photo of Lou with Christy Walsh's son. The pics of Lou with kids always get me. There is something so innocent and pure about them.

[/URL]
As a real close runner up isn't really memorabilia in the truest sense, but you would have to kill me to take away my Kreindler.