Nib: Medium 14k Gold No.33
Sheaffer Balance 350 circa 14k Sheaffer #33 nib, celluloid, lever fill Lever-filled, Red & Black Marble set Propel -repel 0.9mm Pencil
In 1924, Sheaffer introduced pens made from "Radite" (an early modern plastic), also known as celluloid or cellulose nitrate. ... Among the many pens made with this new substance, the most significant in the Sheaffer line was the Balance, introduced in 1929.