Slide rule with single slider and cursor for traffic flow calculations
Slide rule with single slider and cursor for traffic flow calculations by Nestler for Westfalisches Versandhaus, Bielefeld, Germany.
Slide rule with single slider and cursor for traffic flow calculations by Nestler for Westfalisches Versandhaus, Bielefeld, Germany, in cardboard case with typewritten French instruction sheet
Slide rule with single slider and cursor for traffic flow calculations by Nestler for Westfalisches Versandhaus, Bielefeld, Germany.
Cardboard case for slide rule with single slider and cursor for traffic flow calculations by Nestler for Westfalisches Versandhaus, Bielefeld, Germany.