Parker 51 Mid-Blue Steel Front Part CT

Stainless Steel nib.

CT Chrome trim.

Paker tip sizes are labeled like this:

NP means Needle Point

EF means Extra Fine

F means Fine

M means Medium

B means Broad

EB means Extra Broad

EEB means Extra Extra Broad

MI means Medium Italic

MO means Medium Oblique

MRO means Medium Reverse Oblique

BI means Broad Italic