EDIT: This one belongs to   elessara for winning the raffle!

The silver and blue one.

Yes, half of his entire body is composed of gears. The clock hands that make up his horns are real clock hands--they're black on one side, white on the other, and so I've reversed one of them so black is facing out on either side. And, the gears at the ends of his whiskers are also real watch gears out of an old watch movement.