Okay, so this isn't really a Bluetooth headset. It's just a prop and doesn't really function at all. But how cool would it be if this piece of Steampunk gadgetry actually worked?
By winding the bung, you would power up this earpiece, connecting you to the world around you at once. Nicrosin on Flickr created this work of gear art, noting it was made from pocket watch parts, rubber and sculpey.
Apparently, it's really flexible and lined on the inside with suede for optimal wearer comfort. Pretty cool. But if you're going to go to all the trouble to make it comfy and adjustable, why not throw some real Bluetooth functionality in there as well? How hard would it be to hide Bluetooth components behind all those cogs and wheels?