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Amazon.com: rOtring Isograph Technical Drawing Pen Set, 3-Pen College Set (0.2–0.5-mm) : Everything Else
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NOS Vintage Rotring Isograph Stainless Steel Tip Technical Pen Made in Germany 0,13mm, 0,18mm, 0,20mm, 0,25mm, 0,30mm, 0,40mm, 0,50mm, 0,70mm, 0,80mm, 1,00mm or 1,40mm
Amazon.com: rOtring 1903394 Isograph Technical Drawing Pen, 0.1 mm : Everything Else
