Physical description
Students potentiometer type D-73-A. Black top panel with terminal posts, elector knobs and switches. In a polished wood box wit lift-off lid. Circuit diagram inside lid.
Inscriptions & markings
Serial Number 3008
Students potentiometer type D-73-A. Black top panel with terminal posts, elector knobs and switches. In a polished wood box wit lift-off lid. Circuit diagram inside lid.
Serial Number 3008