These neat pens stands in the shadow of their more famous cousins in the 14X, 24x and 34X series. I knew little about these pens before I stumbled over them some time ago and got curious of their nibs – the wing nibs and had the luck to find a few for a reasonable sum and I took an instant liking to these clean, simple and original nibs. These two are equipped with a M, respectively a B. Both has a “-” imprinted after the nib width imprint on the piston knob and I still haven’t found out if that means anything or if it is just a lapse. I’ve yet to try these out in depth, but both nibs are both stubbish and flexy and seem very promising. I’ll get back with a full review when they have been in use for some time.
lady dandelion 
I’m an admirer of this style nib but didn’t know they were walled “wing nibs.” Thanks, Dandelion.
They look very like dip points, press-ganged by a fountain pen maker. Very odd indeed.
The nibs, and pens, assume different characters with their sizes. The 256 is a substantial pen, though seeming shorter that its 146 cousin, and its wing nib looks husky next to the 252 nib.
A wing nib in a 744 is a streamliner of elegance.
Congratulations on finding an out-of-the-mainstream vintage MB classic.
gary
“Wing nibs”… I knew they had a name! It’s neat to have some variation in styles and these are cool.
Interesting nibs – very cool
Yes, they are very original. :)