NOS Rotring 600 First Version Mechanical Pencil 0.9mm Knurled Grip Silver | eBay
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), Silver Barrel : Office Products
Rotring 600 Mechanical Pencil 0.5/0.7 – The Pleasure of Writing