Parker Duofold Senior Streamline Fountain Pen (1929) - Mandarin。Parker Duofold UK Senior (1950s) - Red, Aerometric, 14k Fine。CIRCA 1929 PARKER DUOFOLD SENIOR FLAT TOP 。1927 PARKER DUOFOLD SENIOR BLUE LAPIS FOUNTAIN PEN IN RESTORED。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.