We'll be honest, we didn't write down a corresponding note for this picture so we're not 100% sure we know what it is. We've got guesses, but we won't know until someone can prove in the comments what this is and why it's not that other thing that now that we look at it from the side we sort of think it might be instead. Jump on it like you're Jack Klugman in Quincy.
Lend us a hand, brother:
What is it?