A then “state-of-the-art”, high-accuracy, 0-10 A ac/dc meter built in 1950 and usable as a calibration instrument for other run-of-the-mill meters in the laboratory. The meter, built by the Weston Electric Instrument Corporation of Newark, N.J., USA, is housed in a sturdy wooden box that measures 21 cm by 27 cm and is 15 cm high. A detailed information sheet defining accuracy and other features of the meter is encased in the cover. The sheet is dated 17 April 1950.
