Rotring X00 Series.

rotring 300 Series

Sanford rotring Holding GmbH, Germany

lead diameter(s) mechanism composition variations production date origin	0.3, 0.5, 0.7, 0.9 mm (and 2.0 mm, see below) pushbutton incremental advance clutch plastic barrel, grip, and indicator; metal mechanism and clip none 1990s Germany
special features	lead degree indicator

rotring 300 / 2.0

Sanford rotring Holding GmbH, Germany

lead diameter mechanism composition variations production date origin	2 mm pushbutton spring clutch plastic barrel, metal fittings none 1990s to present Germany
special features	lead degree indicator

rotring 400 Series

rotring Werke Riepe KG, Germany

lead diameter(s) mechanism composition variations production date origin	0.3, 0.5, 0.7, 0.9 mm (and 2.0 mm) pushbutton incremental advance clutch plastic barrel, grip, and indicator; metal mechanism and clip none 1990s Germany
special features	lead degree indicator

rotring 500

rotring Werke Riepe KG, Germany

lead diameter(s) mechanism composition variations production date origin	0.3, 0.5, 0.7, 0.9 mm pushbutton incremental advance plastic barrel, metal mechanism, grip indicator and clip barrel color: black, bordeaux, gray 1980s–1990s Germany
special features	lead degree indicator

rotring (500)

rotring Werke Riepe KG

lead diameter(s) mechanism composition variations production date origin	2 mm pushbutton incremental advance clutch plastic barrel, metal fittings unknown 1980s Germany
special features	degree indicator

rotring 600

rotring Werke Riepe KG, Germany

lead diameter(s) mechanism composition variations production date origin	0.3, 0.5, 0.7, or 0.9 mm pushbutton auto advance, fixed sleeve all metal: brass barrel barrel finish: black, silver 1980s to 90s (0.5 mm model produced longer) (Germany)
special features	lead degree indicator

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