The Weston Electrical Equipment Amperes A.C. 25-500 cycles is a high-quality voltmeter designed for accurate measurement of alternating current in the range of 25 to 500 amperes. Manufactured by Weston, a trusted brand in the industry, this meter is reliable and efficient for various industrial and commercial applications. With its ability to measure AC currents, this voltmeter is essential for ensuring electrical safety and efficiency in testing and inspection processes.

I don't know much about this, the needle moves freely but not sure how to test if its in working order