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These PhillipsNorelco Duo-Vue projection units are straightforward to restore. It uses a 3NP4 (MW6-2) 3" projection CRT, which are not too hard to find. The two front surface mirrors in the "protelgram" projection unit will likely need to be re-silvered. There are several companies around the country who can do this job. The unit was designed to be hooked up to the customers existing B&W TV, and allowed a 4'X3' picture to be projected onto an external screen.
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John Folsom
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