The 1943 Parker 51 Vacumatic in Midnight Blue! Brushed Lustraloy (stainless steel) cap. The rarest year of manufacture, especially in the fourth quarter, such as this one. Almost all of Parker’s manufacturing capacity was being used for the war effort (bomb sights, etc.), with what few pens being made all going to the armed services for soldiers and officers. On top of all this, the pen is fitted with a double-broad “Ball” nib, designed for left handed writers (although right handed writers could certainly use it as well). New-old-stock. Mint.