Parker 51 Nib Sizes

[enbro]

I read somewhere that "Accountant" was the finest nib, however I found this ebay auction for an NOS fine nib with the following photo showing a "Needle" size. I thought it was worth putting up here, my apologies if it's been displayed before.

 

http://i23.servimg.com/u/f23/12/43/15/29/p51_ni11.jpg

 

http://i23.servimg.com/u/f23/12/43/15/29/p51_ni10.jpg

[FarmBoy]

The envelope was not specific to 51 nibs.

 

T

[jniforat]

kinda looks like one of my extra-fine nibs, but i could be wrong

[OldGriz]

Here is a picture from a Parker catalog (from Parker 51 book) that shows all the nibs available for the 51

 

[Moynihan]

Curious.

Has anyone ever done a size gauge (say mm/fractions of a mm) of Parker 51 nibs, so one could actually ID the nib size? Say a measure across the very tip (may not be best since tipping material left may vary?) or across the "base", i.e., at the point the hood begins?. Or....?