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Weston Model 322 No 2125, with external box with a 10 and 50 step or button selection
The closure \'catch\' for the wood box is not present.The wood box has a painted identification VOLTS-1-10-50 AC + DCTwo of the rubber exterior \'feet\' are not present.
Heat Dissipation: Measuring higher voltages (like 10V or 50V) or large currents generates significant electrical heat. Keeping the resistors in a ventilated, external wooden box prevents that heat from warping the sensitive \"pivot-and-jewel\" meter mechanism inside the main unit.
It has a switchbox style accessory with a 10/50 step selection.
Thank you for looking
