This week's collaboration with What is It? Blog brings us this strange object: can you guess what it is? More clues at What is It? Blog.
Place your guess in the comment section - and please, post no URL; let others play. No T-shirt this week, you're playing for bragging rights only.
Update 6/29/07: It's a device for holding shirt sleeves: Patent number 640,080. No one got it right, but there were many creative guesses!