The Weston 622 VTG 100 MA DC Only Test Measurement Industrial Tools is a reliable panel meter designed for measuring DC currents. With the trusted Weston brand name, this industrial tool is specifically tailored for precision testing and measurement in various industrial settings. Ideal for professionals in the field of electrical testing and inspection, this product ensures accurate readings for DC currents within the specified range. Its compact size and durable construction make it a valuable addition to any testing and measurement setup.

Vintage WESTON sold as-is, no returns.   Any questions please let me know.  Not sure how it works.