Is that '60's.....slight chance it could be semi-flex.
.... After '65 the nib I assume be a once normal issue, springy 'true' regular flex....like the old 120/150 or 200. I don't know.
As far as I've read outside the H&D nibs Pelikan didn't make semi-nail and nail nibs until 1998.
In no one ever mentioned one of the spade late '60s-82 nibs as semi-flex....I stayed away from them...back when I was chasing semi-flex hard.
In you didn't mention how much you paid....If you Buy Now....you are always an idiot with a lot of money. Chase them on German Ebay. One must find a dealer that takes Pay Pal...some German idiots want to save a penny, so won't take Pay Pal...costs $35 to do a bank wire transfer. We use bank transfer that are in the EU as cheap as checks are in the States.
Do make sure they will ship outside of Germany....there are idiots like that too.
Buy Now= E150-140. Past auctions, E24-29 or 40. Dollar is now strong....say 5% lower than an Euro.
E24-29 or 40, is a good price for a working top tier company fountain pen.
In I want a few Original Reforms from the early '50s.....Pelikan of your era will have to take a back seat.
Best buy is a late '50-mid-late 60's Geha 790 (only***)...semi-flex. (I have 4. One because it's a true three ring, '59 M, one because it was first..KM, the other because of a maxi-semi-flex EF nib and one an real nice OB, because the barrel is gray stripped. )
***I never had enough money to buy the 712 so can't say for sure what the nib is.
The 725 is well worth having...as one of the prettiest best balanced pens ever made....semi-flex inlaid nib.
The Geha School pen...piston, is a very, very good for the price pen....can still be had for E12 if you look....E19 is the now normal. There are German Pirates sailing in the American Water, wanting only $89....buy now for this E12 pen. A good springy, true regular flex nib. Well balanced, solid.
Do not buy any Geha cartridge pens....cartridges are scarcer than hen's teeth. When Pelikan bought up the Geha pen division in 1990, Geha had made a cartridge that fit both Pelikan and Geha. Pelikan cartridges never fitted Geha.....still don't.