The Demi sized fountain pen has a Medium 14K nib and has never been inked, however, someone has scribbled on the "SMART SET" pamphlet sing something like a Liquid Lead pencil. I haven't changed the filling unit or the jewels, and I bought this set at an estate sale, appearing to be unused, so I believe this set came from Parker this way, with mixed parts from two versions of the 51.
Big Red Senior from 1928–9 I own several Duofold Seniors.
Parker 51 Pens for Sale The Parker 51 pen was launched in 1941, was very popular through out its production, and can still claim the highest sales volume of any fountain pen.
Its production spanned from 1941 to the early 1970s.
The Parker 51 fountain pen was named because research and development was completed in Parker's 51st year (1888 - 1939).
Kenneth Parker said, "The pen was made to look like someone's idea of a dream pen.