Dating parker 51

Parker went into the cartridge pen business with the Parker 45 "Convertible" pen, which is still in production today essentially unaltered in design (parts from vintage and current 45s interchange cleanly).This gave uses the choice of filling from cartridges or bottle.Supposedly this helps draw ink back into the pen when it wasn't in use.Parker used the Lucky Curve into the 1920s as a competitive market differentiator in a crowded pen market.The Parker 51 featured a number of technical and design innovations.The nib was concealed under a hood, leaving only the point exposed.

Although they did produce some examples of lever fillers, they prefered their own homegrown mechanisms.Parker was founded by George Stafford Parker in 1891.Early Parker pens had the unique patented "Lucky Curve" feed, which was an elongated conventional feed that curved back to touch the barrel wall.The cap was a slip on cap instead of a screw cap and was made of metal with an internal clutch that lets it cap firmly with no danger of splitting or scratching the barrel, unlike any of its contemporaries.

The high desirability of the Parker 51 led the other manufacturers to rush out their own pens with concealed nibs.

Parker was still able to succeed in this area with the popular and ubitquitous low-end Parker Jotter ballpoint, and many generic ballpoints use Parker-style refils.