A. W. Faber Castell 1/87 mechanical slide rule. Pearwood & celluloid. Germany. 1930
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Description
Mechanical bilateral technical slide rule.
Germany. Circa: 1930's.
Brand: A. W. Faber Castell.
Model: 1/87 Nº 387. Rietz system (10 scales).
Pearwood & celluloid. Metallic cursor. Black original box.
More information
Black and red arabic numerals.
Sliding and articulated tool with different scales for engineering and construction.
Sheet printed on the back with tables for calculations.
Near mint condition. Work well.
Measures: 30 cm long, 4 cm wide and 0,9 cm thickness.
Weight: 113 grams (171 with case).
Antique mechanical slide rules.
Bilateral technical slide rules.
A. W. Faber Castell articulated slide rules.
Ancient engineering and construction instruments and tools.
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