Vintage Pen Catalog: Parker: 1945 to the present
13843: Parker 61: black capillary-filler, 12.8 cm long, stainless steel cap, gold filled trim, test-market design differing in several key respects from the full production version introduced in 1956: "61" logo pierced into gold undernib shield and barrel-end vent; integral barrel and hood construction; unique cap design, interior details shown in US patent 2,773,479, applied for March 1, 1952.