Slide Rule Faber Castell 1/87/387 (0495)
Index: 0495
Year: Ca 1940
Maker: Faber Castell
Dimensions: 30 x 4 x 1 cm
Info
Faber Castell 1/87/387 without case or etui. The back has tables in French for old measurement units (Pied de Paris, Pied de Burgois, ...), old weight units (Poids Prussien, Livre de Russie). Also tabble of constants and tables of specific weights. And finally elasticity numbers (Chiffres d'Elasticité).
One side has cm ruler, the other a ruler in scale 1/25.
