At least I got a little time write. A couple of weeks ago I was looking after my first P51 and thanks to farmdogfan now I am a happy owner of this magnificent pen!
The pen is a MKI aerometric with beautiful black body and lustraloy cap, there are no date marks but it has the basket clutch spring, and the black plastic ended converter so it is one of the early aerometrics (please correct me if this is not true).
I have to admit that I really hated this design before (bad lasting memories from childhood using P51 fakes at school) and I was a bit afraid. And I never really liked the idea of a hooded nib……BUT when I saw mine that beautifully proportioned shiny black barrel, the heavy cap that feels machined, that somebody really worked on it. And that solid clutch ring that divides the pen compositionally it is perfect, it just gives the necessary amount of detail to the pen body without being just a "decorative" element. If you divide the length of the visible barrel when capped with the golden ratio number 1,618 it gives the length of the cap (I observed this on more Parker pens) and these were just the looks.
Now to get to the tactile review. It just feels perfect for my hands, it is like a highly polished gem, jewel it does not feel at all like "plastic". The thickness is also extremely comfortable for writing in comparison the P75 seems a bit too thin for me. At 20grams the pen may seem light but not that light to feel cheap. Its a wonderful piece of architecture! Behind that streamlined body hides the technology, you know from the beginning that its an old pen but feels modern. It resembles pure elegance, professionalism in this minimalist design. I started to like this idea very much, that the nib is hidden, that only I know (from my colleagues) that there is a nice gold nib, most of them don't even recognise it being a fountain pen. It is like the pen reveals her secrets only for the user.
As for the writing performance its smooth, wet, holds a lot of ink. I use it as a daily user because I'm afraid that my P75 is too flashy in many situations.
Also as a comparison many compare it to the P51 Mustang but for me it is much more like the Mallard Steam Locomotive, as far as I know the most elegant and fastest steam engine.
Some pictures of my P51:
Have a nice day!