Nib: Medium 14k Gold No.46
Sheaffer 5-30 Flat Top from 1920s-30s. Ring top version in jade green Radite (plastic) with gold plated trim. Lever filler Barrel imprint W.A.SHEAFFER PEN Co PAT. AUG.25-08-FORT MADISON,IA.U.S.A. DEC.10-12-JAN.27-OCT.20-NOV.24-14
The Sheaffer Pen Company produced Flat-Top fountain pens from 1912 until some time after the middle of the 1930s, possibly as late as 1940. (“Flat-Top” is not Sheaffer's name for this design.) ... Until 1922, clips were straight and were imprinted with the words SHEAFFER-CLIP.