Originally Posted By: B. Dudley

The original Parker hinge pin was a single piece was pressed in and the ends were not stepped. They eventually went to a two piece design that had stepped end and a slotted screw on the other separate end.

I am sure Brian knows this, this pin is not the hinge pin on a Parker, it secures the "roll" in the frame, the roll is the hinge pin. It is a feature in that the hinge pin was easy to change with an over size one.

I learn something every day, and a lot of times it's that what I learned the day before was wrong