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uNI 0.5 M5-552

Mitsubishi, Japan

lead diameter(s) mechanism composition variations production date origin	0.3, 0.4, 0.5, 0.7, 0.9 mm incremental pushbutton advance plastic barrel with metal and plastic components none known 2007 Japan
special features	rotating lead degree indicator

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Uni 0.5 U5-703

Mitsubishi, Japan

lead diameter(s) mechanism composition variations production date origin	0.5 mm, ? pushbutton incremental advance clutch plastic barrel with metal components unknown (1990s) Japan