Amazon.com: Rotring 600 3-in-1 Multicolor Pen and Mechanical Pencil, Switches Between 2 Ballpoint Pen Fine Point Tips (Black and Red Ink) and 1 Mechanical Pencil Tip (0.5mm Lead), Black Barrel : Everything Else
ROTRING 600 - AUGENWESEN
So, you want to buy a vintage rOtring? A "guide" of sorts. — The Clicky Post
Amazon.com: rOtring 600 Ballpoint Pen, Medium Point, Black Ink, Black Barrel, Refillable : Everything Else
Rotring 600 Trio pen review - YouTube
Rotring 600 3-in-1 2 Color Fine Ballpoint Multi Pen + 0.5 mm Pencil - Silver | JetPens