What nib size this Parker 51 is?

[aurore]

Is it Fine? Extra fine? Or rather a finer Medium? 

A British 50s pen. 

Thank you.

 

 

[inkstainedruth]

Seeing an actual writing sample might help.  Although from the photo I'm wondering if it's an oblique nib, due to the slant of the tipping.

And last fall I had two vintage 51 Vacs repaired -- both, in theory, had F nibs, but the Cordovan Brown one and the India Black one did NOT write the same: the black one is a lot wetter a writer than the brown one, as I recall.

Ruth Morrisson aka inkstainedruth

[IThinkIHaveAProblem]

Best way to find out is a writing sample then use something like Richard Binder’s guide to figure it out. 
 

https://indypendance.com/pages/stroke-width-chart

 

 but it does look pretty fine 

[Beechwood]

Looks like a Fine to me, not sure that Parker made an Oblique Fine, but I take Ruth's point.

 

 

[pen lady]

Whatever size the nib is, the pen looks like it needs a good flush though.    Just sayin'😉