Portable Decade Wheatstone Bridge Resistance Box [1992-26], Robert W. Paul

Wooden box with hinged lid. Inside instructions for use are screwed to the lid. Five large Bakelite dials and white arrows, 2 large and 4 smaller brass alloy screwing mechanisms and two brass alloy knobs are set into a Bakelite panel. Two of the Bakelite dials are marked with white paint - one reads "X" and the other with two dots and a line. The box also has two embedded hook fixings and another fixing to the sides all in brass alloy. There are also 5 brass alloy fixings to the front.