Variable Inductance Unit Sullivan & Griffiths. I don't have the means to test this but it originally came from a university stock sale. It's in beautiful complete order the terminals are chrome brass and all present with non miss, it's a good tidy example, it has a few scratches to the varnish finish but they aren't deep only superficial, I think the wood box maybe piranha pine but I'm not exactly sure. Any questions please feel free to ask.
Please see my other listings thanks. This item is in the category "Antiques\Science/Medicine\Scientific Instruments".The seller is "soundcandy" and is located in this country: GB. This item can be shipped to United Kingdom.