Leeds & Northrup Post-office pattern resistance box model 4252

Leeds & Northrup Post-office pattern resistance box model 4252 comes in a mahogany case with 2 binding posts (on the left end in the image) and 16 resistor knobs of 1,2,3,4,10,20,30,40,100,200,300,400,1000,2000,3000,4000 ohms. Front view.

Figure 1: Leeds & Northrup Post-office pattern resistance box model 4252. Front view.

Leeds & Northrup Post-office pattern resistance box model 4252 comes in a mahogany case with 2 binding posts (on the left end in the image) and 16 resistor knobs of 1,2,3,4,10,20,30,40,100,200,300,400,1000,2000,3000,4000 ohms. Front corner view.

Figure 2: Leeds & Northrup Post-office pattern resistance box model 4252. Front corner view.

Leeds & Northrup Post-office pattern resistance box model 4252 comes in a mahogany case with 2 binding posts (on the left end in the image) and 16 resistor knobs of 1,2,3,4,10,20,30,40,100,200,300,400,1000,2000,3000,4000 ohms. Front top view.

Figure 3: Leeds & Northrup Post-office pattern resistance box model 4252. Front top view.

This post office pattern resistance box has a total resistance of 11,110 ohms in 1 step increments. The required resistance can be obtained by removing the plugs one by one. Resistors provide 1,2,3,4,10,20,30,40,100,200,300,400,1000,2000,3000,4000 ohms. It is ideal for laboratory use.