Though I agree with each and every word written in Chapter 11 of David Rees’s book, these Permapoint mechanical pencils from Eberhard Faber are an exception, owing to their clamp erasers.
The double-ring motif usually found on the ferrules made its way to the cone of the pencil:
Each pencil comes pre-loaded with 12 short leads, and the barrels feel as if they are just slightly narrower than a wood-cased pencil:
Jealous! You’re killing me. I’ve never been able to find these in such nice condition.