Item 74522 - Portable electric test meter, ca. 1912 Item 74522 - Portable electric test meter, ca. 1912 Contributed by Maine Historical Society Item 74522 Zoom 2842px x 4200px - 9.5"w x 14.0"h @ 300dpi | Need a larger size? *Credit line must read: Collections of Maine Historical Society Image Info The portable rotating standard meter enclosed in the box was used to test watt-hour meters to ensure that customers' usage was reported accurately. Show Details
