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reverse imprint: “Tombow Pencil Company Limited”	gift from isu of The Uncomfortable Chair

Tombow Mono

Tombow Pencil Co. Ltd., Japan

lead diameter mechanism composition variations production date origin	2 mm pushbutton spring clutch plastic barrel, metal fittings none 1970s Japan


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Tombow unknown model

Tombow, Japan

lead diameter mechanism composition variations production date origin	0.3 mm (0.5, 0.7) pushbutton incremental advance all metal none (1980s) Japan
special features	lead degree indicator
see also	Uchida Sharp Drawing thin lead drafting pencil

This pencil shares a strange nose-heavy form with one from another Japanese maker, Uchida.


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Tombow Monotech

Tombow, Japan

lead diameter mechanism composition variations production date origin	(0.3), 0.5, 0.7, (0.9) pushbutton incremental advance clutch plastic barrel and indicator wheel, metal grip and mechanism accent tone: black, silver (circa 1990) Japan
special features	lead degree indicator
see also	Tombow Monotech thin lead drafting pencil (dial type)


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Tombow Monotech 2.0

Tombow, Japan

lead diameter mechanism composition variations production date origin	2 mm pushbutton spring clutch plastic barrel and indicator wheel, metal grip and mechanism wheel color: blue, gray, ? grip color: black, silver 1990 USA
special features	unique lead degree indicating wheel
see also	US Design Patent 324,069 "Lead Holder," 1990

I believe this variant without “Monotech” on the imprint was for the US market.


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Tombow Monotech

(dial type)

Tombow, Japan

available lead diameters mechanism composition variations production date origin	(0.3), 0.5, 0.7, (0.9) pushbutton incremental advance clutch plastic barrel and indicator wheel, metal grip and mechanism accent tone: black, silver circa 1990 Japan
special features	unique lead degree indicating wheel
see also	US Design Patent 324,069 "Lead Holder," 1990 Tombow Monotech thin lead drafting leadholder (without dial)


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