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RCA "Trade Secret" Documents
This showed up on eBay yesterday.
http://www.ebay.com/itm/Vintage-RCA-...item1e89cf15db
From the photos, it looks like CRT information. From the dates (1937-1943), it looks like it probably only pertains to B&W tubes, but who knows? 15GP22 secrets?
Last edited by Tom9589; 04-07-2014 at 08:36 PM.
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