1. 1602 (x)
  2. Edith M. Wallace (x)
  3. 1933 (x)
  4. Scientific Instruments (x)
  5. Search Results

Search Results

(1 - 2 of 2)
Potentiometer, standard resistance
Title
Potentiometer, standard resistance
Format
photograph: negative
Description
Auxiliary resistance box. Mfg. Otto Wolff, Berlin.
Potentiometer, low resistance standard
Title
Potentiometer, low resistance standard
Format
photograph: negative
Description
Model no. 7521. Also called a resistance box. Wood, brass fittings. Ink circuit diagram inside separate top. Original inventory card on file. Mfg. Otto Wolff, Berlin.