What Is This???

[Enzo]

I'd like to thank my producer and director, my mom and dad, Jesus our lord, and all the little people behind me. HEY! There goes two of them now, I can never seem to catch them... Darn ankle biters anyway...

[m2466d]

Wow, awesome replies, thank you they are much appreciated. I'm going to try it out with my acoustic later. Thanks again!

[rjb]

Here's a pic of the inside.

One mystery solved.
Now... what is that round silver thing its sitting on?

My guess:
A removable resonator from a tiny banjo ukelele. Looks like it has three nuts of the type that would be turned with a banjo key....

-rb