When I first met my Drain she worked at the Platignum factory in Stevenage, we used to sit and assemble pens at home for our bottom drawer money as she called it.
I used to assemble the left handed fountain pens cut at a specific angle for the user.
They had a left handed tester who would take a random pen and scribe with it for quality control.
It was fascinating to watch his hand working he would write upside down and lift his hand from the paper so as not to smudge the ink, very strange I actually felt sorry for this person and looked upon him as being disabled.
How times have changed init?
Ed I remember that nib also made by Mentmore at the platignum factory.