Vintage pens don't get much more perfect than this. It's collector grade.
Barrel clarity, color, condition, plating, plunger. It's amazing. Like someone bought it in 1946 and put it in a box until 2020.
No additional description is adequate.
Length
Capped - 129 mm (5.1”)
Uncapped - 120 mm (4.7”)
Posted - 150 mm (5.9”).
Diameter
Cap - 13.8 mm (0.55”)
Barrel - 12.2 mm (0.48”)
Filler
Vacumatic
Nib
Modern, Western Fine