ANTIQUE AMBU TYPE E TRUCK AUTOMOBILE AMBULANCE VOLTMETER Salvation Army Original 1920s all-brass trade sign

Original 1920s all-brass trade sign American Brass Company

In great condition

Published by Verlag von Ugen Ulmer

THIS FACILITY HAS BEEN DECLARED A RESTRICTED AREA ACCORDING TO A SECRETARY OF DEFENSE DIRECTIVE ISSUED 20 AUGUST 1954 UNDER THE PROVISIONS OF SECTION 21

recently professionally bead blasted

ANTIQUE AMBU TYPE E TRUCK AUTOMOBILE AMBULANCE VOLTMETER Salvation Army Original 1920s all-brass trade signA very unusual multifunction automotive meter, probably 1930s. Believed to be a meter for commercial vehicles such as trucks and ambulances. Made by American Bureau of Engineering (Ambu) Chicago. Featuring a voltmeter with a scale of plus and minus 2. 5 and 25 volts, four binding posts and a fuse holder. In addition there are three rings adjusted with three tabs around the bezel. These calibrate five settings around the dial labeled "Engine Running