Alabama Mart Kalmerend inlaid nib fountain pen vinger Kalksteen Melodramatisch
Pilot Inlaid Nibs of the 1970s. Known names in the comments. : r/fountainpens
Sheaffer Inlaid Nibs – its just a flick-up | Penfountain's Blog
Crónicas Estilográficas: More Pocket Pens
My collection of inlaid and hooded fountain pens: Pelicano Happy Pen (1974), Sheaffer Targa (1986), Waterman Carène (2010), Lamy 2000 (2016), two unidentified Parker pens. Would anyone care to guide me towards
Yes, found it! A Sheaffer with long diamond inlaid nib :) : r/fountainpens
The Evolution of the Sheaffer Inlaid Nib 1959-Present
Sheaffer Quasi-Imperial Steel Fountain Pen Nibs - Cartridge/Converter Version, Short Diamond Inlay, Fits 330/440/etc. (New Old Stock, Nib Unit Only) - Peyton Street Pens
Sheaffer Imperial 14k Fountain Pen Nibs - V-Inlay Style (New Old Stock) - Peyton Street Pens
Sheaffer Targa Spare Gold Inlaid Nib Section for a Targa - Etsy