For your consideration this 1980s Vintage Waterman Le Man 100 Opera Fountain Pen 18k Gold Nib (Fine).  This pen was purchased in the early 1980s.  Barrel is black lacquer over brass; has engraved number 111159.  Filling mechanism: cartridge.  Made in France.  Clip/Accents:  Gold plated clip and cap rings; tubular shaped cap rings; Medallion on the base of the clip.  Nib:  two toned silver and 18k gold; Fine NIB.  Inscription:  Waterman Ideal Paris 18k-750 Feed; ribbed.  Pen is in great condition but does have some micro scratching consistent with a pre-owned pen.