This is for a used Weston lab meter, AC volts. 25 - 1000 cycles. 0 - 150 - 300v AC scale (MTR) 433-300VAC2.

This has Side terminals. Leather strap. Black bakelite case. 0 - 150v, 6,720 ohms internal. 0 - 300v, 13,454 ohms internal. 3-1/4" x 5" x 5-1/4"H. Only one available.Weston Lab Meter / AC Volts