Posted 16 January 2013 - 02:02
I'm not sure about the pens themselves but many professions preferred certain types of nibs for their writing needs.
Many companies (including Esterbrook, Parker and Sheaffer) produced accountant, manifold, clerical/secretarial, bookkeeping and shorthand nibs that were designed for office workers, salesmen, accountants, book and records keepers and secretaries.
Parker: Sonnet Flighter, Rialto Red Metallic Laque, IM Chiseled Gunmetal, Latitude Stainless, 45 Black, Duovac Blue Pearl Striped, 51 Standard Black, 21 Super Red, Vac Jr. Black, 51 Aero Black, 51 Vac Blue Cedar, Duofold Jr. Lapis, 51 Aero Demi Black, 51 Aero Demi Teal, 51 Aero Navy Gray, Duofold Pastel Moire Violet, Vac Major Golden Brown, Vac Deb. Emerald, 51 Vac Dove Gray, Vac Major Azure, Vac Jr. Silver Pearl, 51 Vac Black GF Cap, 51 Forest Green GF cap, Vac Jr. Silver Pearl, Duovac Senior Green & Gold, Duovac Deb. Black, Challenger Black, 51 Aero Midnight, Vac. Emerald Jr.