Nib: Medium steel (Octanium)
Parker "51" Grey Barrel, Matte Lustraloy (stainless steel) cap, Chrome ‘Plain Clip with imprint "Parker, Made in Canada"
* has a Parker 21 cap
Parker "51" also added to the series in 1950, the Parker "51" Special. This had the aerometric filling system but in the manner of the Demi "51" with a U-shaped pressure bar. The big difference was that it sported an octanium (eight metal alloy) nib rather than one made of gold and it came with a shiny chrome cap only (the Standard Parker "51" were made in a matte chrome design).