My story with Pelikan pens started at school; in Spain, their products were insanely popular in the late 80's, the only ink that fed my Inoxcroms was the Pelikan 4001 royal blue and the most desirable gadgets ever for a 10 year old were the Pelikan cases, I have found a couple of examples:



None of those are as cool as the one I had, mine was way bigger, had a fighter pilot drawing on the cover and it even had a calculator watch embedded, as you can imagine, I felt at the time I could rule the world with that case.
Anyhow, I tell this story just to make a simple point, every time I see a Pelikan pen I can't help but think of my old world-ruling, butt-kicking case and, for some reason, I just can't envision Pelikan as a fine writing product's company and therefore I never got myself into buying one... until a couple of days ago.
I was hunting in eBay for a vintage Montblanc, and by chance found an auction for tortoise vintage Pelikan, snapped it at the last minute for around 60 euros and here you have it




As you can see, it is not in mint condition, the clip needs to be adjusted and has some brassing, there are also some light scuff marks around the barrel, but man, it is gorgeous to look at. I briefly inked it and it writes fantastic a nice medium not too wet/not too dry line and it is so light... to sum up looks like a great acquisition, and now I see Pelikan pens different eyes.
I also have some questions for the experts:
1. The seller said it was a 400NN, looks to me that it is a 400, anyone can confirm it
2. How do I adjust the clip?
3. Can I disassemble the nib section for deeper cleaning?
4. The piston knob seems to be dark brown but the cap is black, is that normal?
5. How can I polish off some of the scuff marks?
Thanks for reading.