Blue lacquer.
Waterman Preface Blue Marble Fountain Pen--18k medium nib--new
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Vintage Osmiroid 65 Italic Fountain Pen Lever Fill Fountain - Ireland
Hero 18k Gold Limited Edition Deer Metal &seashell Engraving Fine Nib 0.5mm Fountain Pen Office School Writing Tool Gift - Fountain Pens - AliExpress
Osmiroid Nib
Parker Marble Pen
Osmiroid Nib
Osmiroid Drawing Pen