Hi there, I have a Parker 51 pen here that I thought you might wish to see:
Photo A: Parker 51 pen, gold and brown.
Photo B: Parker 51 lid, with arrow ( or *quill* ) design on pen top shirt-clip.
Photo C: "Parker 51" inscribed inside of pen, where pen is re-filled.
Photo D: Some of my other pens that I grabbed here quickly, just FYI: 1). Eagle 14kt, Made in Canada
2). The Conway, 14kt, No.475, London
3). Parker 51 Pen, as shown here
4). Parker Vacumatic, 14kt