Type Pump filling fountain pen Product Name  Oversize Dunn-Pen model.  Manufacturer and Year  Dunn-Pen, USA, 1921-7, these are the years the company was active but the casein red pump handle indicates this is a later model...

Type Pump filling fountain pen Product Name  Oversize standard-style Dunn-Pen model.  Manufacturer and Year  Dunn-Pen, USA, 1921-7, these are the years the company was active but the casein red pump handle indicates this is a later...