Parker 51 clutch pencil (0.9mm): , 1/10 12kt. Lustraloy steel cap. Grey jewel, Dove grey barrel
The Parker 51 pen introduced in 1941, and in production until 1972. Parker's period advertising called it “The World's Most Wanted Pen,” a slogan alluding to restrictions on production of pens for the civilian market in the United States during World War II.