What Is It? game 166

It's once again time for our collaboration with the always amusing What Is It? Blog. Can you guess what the pictured item is? Or do you already know?

Place your guess in the comment section below. One guess per comment, please, though you can enter as many as you'd like. Post no URLs or weblinks, as doing so will forfeit your entry. Two winners: the first correct guess and the funniest (albeit ultimately wrong) guess will win T-shirt from the NeatoShop.

Please write your T-shirt selection alongside your guess. If you don't include a selection, you forfeit the prize, okay? May we suggest the Science T-Shirt, Funny T-Shirt and Artist-Designed T-Shirts?

For more clues, check out the What Is It? Blog. Good luck!

Update: grape_ape knew the right answer: it's a brass paper folder, used by pharmacists to wrap powdered medicines before tablets became common. You'll find a more detailed explanation and more examples of such devices at the What Is It? blog answer page. The funniest answer came from Swami, who said, "It's a "First Step" made by Duzee,Inc. Plainfield, MA, circa 1892. Yep, that first step is a Duzee." Both win t-shirts from the NeatoShop!