Because David said that the jewels were salvaged from single jewel pens. Junkers i meant as him taking one part, and not using the rest of the pen. Not necessarily meaning the caps are junk, just meaning the barrel may of been broken/cracked/etc, and unusable.
Barring minority exceptions, top jewels are the same on single and double jewel pens.
How do you know a pen taken apart was a junker and unusable?
regards
david
How "inexpensive" do you think you can get a P51. When David N. stated "inexpensive," Dr. Issacson, do you think it's a NOS or a broken parts pen? Let's let you answer that.