The barrel is black hard rubber. The button on the side unclamps the 1.6 mm lead. The nib is marked "E. FABER USA 8," but there are no other markings anywhere on the thing.
That is an interesting pencil/pen, for sure. Sorry that I can't help with the ID. Does it appear to be built "as one", with everything fitting precisely, or could it be a "Frankenpen" of sorts?
Since Eberhard Faber is a major pencil maker, maybe it is some kind of school pencil/pen for students who needed both lead and a nib for the inkwells at school? Dunno, just guessing here...
Hubert
__________________
My shirt came to me, wrapped up all in black, something funny told me, I'd have to send it back.
Although I couldn't make it fit, I knew I'd have to try. Now I'm telling all of you, I will never buy....
It looks as though it was designed as a complete instrument. Not sure anything but the nib is Faber: they tended to mark their products pretty thoroughly.
Actually, Mike, I've got to disagree. Check out my post at Leadhead's about the Fabers that slipped under the radar (and into my collection) because they weren't marked as Fabers.
I've not seen a button release on one of these before - normally the tip unscrews to release the lead. Very unusual and an interesting find - I'll have to scrounge the patent databases to see what I can find about it.