1920's Confidence BridgOhmeter * Apparatus Design Company * Little Rock AR

Description

If you're an uncompromising collector of antique technology, make sure to check out all my listings after you look at this one. I don't think you'll find a better, broader or more balanced assortment of technical antiques anywhere -- hundreds of no-reserve auctions each year, almost all of them featuring eye-popping "gee whiz" gadgetry in exceptional original condition.
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Here's a Confidence BridgOhmeter, manufactured by the Apparatus Design Company in Little Rock, Arkansas. The instrument appears to the date to the late 1920's or early 1930's, and I've been told by an electrical engineer that it would likely have been used to determine an unknown resistor value in a radio without having to remove the resistor from the radio. Interestingly, there's a metal tag in the upper right corner of the chart that identifies the apparatus as an "English Tube Tester," but I suspect that tag may have been placed there by a distributor lacking the correct instrument ID.
Condition is very good throughout, as you can see in the pictures. Chart is clean and complete. Instrument panel is clean too, and the dial skirts are all in excellent condition. All controls turn easily, but since I'm not sure how this works, I obviously have no idea how to test it. Accordingly, it's being offered for historical purposes only, with no assurances stated or implied.
Please review the photographs and consider them an integral part of the description.
Measures approximately 14" x 9" x 5". Shipping weight approximately 16 lb.
That's about it. I will package it properly so that it arrives at your doorstep safely. I have been shipping antique phonographs and radios for years, and if you check my feedback, you'll see that I know how to do it correctly. Auction participants with 0 feedback or private feedback should contact me before placing bid. Auction participants with a history of bid retractions will have their bids removed.