This Pelikan 100N fountain pen dates to 1950 and is a transitional model in brown stripe celluloid.  OBB nib; properly marked. The binde is the same material as Pelikan used for the Model 400, introduced the same year.  This is a well documented prototype in the Pelikan books. Extremely rare. Piston filler. New-old-stock. Mint condition.  This is the exact pen found in Gopens catalog by Gary Lehrer.  Catalog no. 88, item 240.