Just a bit more information. The unit is a simple metal box, about 6" long and 1.5" square, with a paper sticker on the bottom that states Win Laboratories and S/N 1529. No model number. The original owner was a colleague of Dr. Win's, so I'm not sure whether it got all the packaging and labeling that others do. It has nothing but RCA inputs on one end and outputs on other, as well as a ground terminal. The power cord also comes out of the metal box and is not detachable. Pretty simple looking, clearly not trying to be good looking!
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