Duncan Type-MD Network Watt Hour Meter

By Mike Jordan; posted September 22, 2017

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Shown is a vintage Duncan Type-MD network watt hour meter. Meter is in very good condition and operates nicely. Cleaned the upper guide bearing and lower jewel / pivot bearing. I've found that Caig Laboratories, Deoxit X10S, silicone instrument oil works very well for meters that have the jewel / pivot bearings. One drop does the trick.