It does not have to be rounded off , that is the the way the nib is supposed to be!!!!
German Stubbed....it is not the previous owner copied an encyclopedia.
I had thoughts someone did a shade tree mechanic stubbing of my first German vintage pen of that era.............in I didn't know better.
That flat stubbish is normal.
The only German pens of that era that have the American Bump Under, are the Lamy Nails of that era and Lamy's sub brand in regular flex the Artus.
The school pen, regular flex Pelikan 120 is half stubbed, with part of that American Bump Under, Geha's school pen also in regular flex has the American Bump under.......for school kids.
......also found on 'English" Pens...could be French and Italian also......................but the German Vintage pens of before 1970, were on the whole flat stubbish nibs of semi-flex.
That is part of the reason for such great flair line variation.
I do in I have a hell of a lot of semi&maxi-semi-flex, & have a couple of mid-'60 German no name semi-flex with the rounded American Bump Under nibs............a nice comfortable nib to write with but, no built in flair.
I imagine, the 2/9xxx Esterbrook semi-flex and the rare 'early' '50's Sheaffer semi-flex like the '40's Whal-Eversharp semi-flex are American Bump Under nibs.
My English made, '50's Parker Jr. Duofold semi-flex has the American Bump Under nib also.
So a flat...flattish, stub or stubbish nib on a semi-flex nib seems to be a German characteristic. And is just fine....no need to think one needs to round off the sides....in they are stubs already....not Italic or .....could be Cursive Italic had not been even invented in those days.
You are good to go, once you shove the nib in.
You need a half a rice corn of 100% silicon grease....to smooth the piston. Apply it to a Q-tip and rub right under the withdrawn piston.....you will have to do that every 3-4 years....so a little bit will last you a life time.
Back a decade ago when it was hard to get, someone sent me a thumb knuckle sized container that is still 1/3 full and I've got a lot of piston pens.
Rick...one of those guys with one name***....Rick Popas(sp) the Pelikan Guru, said...once every 3-4 years will do just fine. ***Like Richard or Ron.
Many of my old Pelikans, are still just fine, and they are much older than silicon grease...and I didn't need to grease them. Some do get or were draggy, so I grease them.
1/2 a rice corn....is plenty!!!!!!!
There is no reason to grease a Pelikan all the time....It is Not a Twsbi or an Ahab. Once every 3 year or so years.