A set of two Parker 51 gold plated writing instruments, a fountain, and a ballpoint pen with original box. This famous Parker pen model dates back to 1940 when it was first launched into the market. This model was named in honor of the 51st anniversary of the Parker Pen Company. Many historically important documents were signed with a Parker pen of this particular model. For example, all 49 representatives of the countries signing the armistice treaty with Japan in 1951 used this particular pen. Collectible Writing Instruments And Desk Accessories, Luxury Pens.