Not much to say about this pen - it is a weird shade of blue that is not that dark to my eye. This model also comes in M405 and M805 sizes, both of which I wish to collect at some stage.
This 14K M600 fine might have the letter F engraved on it but in practise it writes like a broad. I don’t really know why the makers of this nib could get it so wrong. It writes well but produces a broad wet line.
Noodler La Reine Mauve is pretty nice waterproof royal purple colour. Like a lot of the early Noodler’s this is a very saturated ink. The broad nib doesn’t do this ink any favours.