Posted 9 years ago
CWcollection
(48 items)
Metal plate reads
WESTON LAB STANDARD ac dc ammeter patd dates 1895,1898 and 1913.
These were used long before miniaturization was even thought of. It measures 15 x 14 x 5 inches ,weight about 40 lbs. meter scale is very long and has a mirror to help read the scale.
