OHMITE 5000E 旋钮牌, 铝制, 黑色
The is a Dial Plate made of black-enamelled aluminium and handsomely finished. For ohmite rheostats and tap switches. The figures and lines are etched on a black background for contrast and ease of readability. On rheostat dial, the divisions indicating approximate percentage of rheostat resistance in circuit are marked from 0 to 100.