Lot of 2 Weston Model 45 Meters. DC Ammeter, dated 10/20/1923 and DC Voltmeter, dated 08/20/1943. Interestingly, these were certified by the same Weston employee 20 years apart.
I believe these were purchased from Muhlenberg College about 15 years ago when they were cleaning out storage closets.
These are very heavy, around 10lbs each. I have not tested them. They are a bit dirty, but condition is good considering they are 81-101 years old!
