Parker Duofold Senior Fountain Pen (1920s) - Lapis Marble, GP Trim。Parker Duofold Senior Deluxe Streamline Fountain Pen Set (1930s。1950s PARKER DUOFOLD Senior Aerometric Made in England 14K Gold F。RARE C1923 DUOFOLD SENIOR RED HARD RUBBER LARGE IMPRINT FOUNTAIN PEN R。。Parker Duofold Senior with 14k Made in England nib.From 1959. Red color (Dark red Burgundy)I would say it is a “Fine” size nib. Aerometric type. It is currently loaded with Waterman Intense black ink and writes smoothly. You may want to clean it once before use. Since it is a 65 year old pen, of course it will have micro scratches on the barrel.