Title

Voltmeter / Ammeter. Creator: Unknown.

Caption

2-1/4 in. dia. range positive & negative 30 amps with 2 posts

Credit line

Photo12/Heritage Images/Heritage Art

Reference

HRM21A88_398

Model release

NA

Property release

NA

License type

Rights managed

Available size

38,0Mb (631,1Kb) / 12,1in x 12,1in / 3643 x 3643 (300dpi)

Keywords

technology education color instrument gauge meter ammeter Colour Smithsonian Institution voltmeter National Air and Space Museum Educational Institution air and space museum electrical instrument scientific institution object Unknown steel glass plastic Keystone Archives Heritage Art copper alloy Paint NASM INSTRUMENTS-Miscellaneous