Hm, not sure about the CRT. But I was looking through those other listings and there was indeed some interesting stuff...
http://cgi.ebay.com/VINTAGE-PORTABLE...b#ht_576wt_930
Got any idea who made these? It looks like a Mitsubishi emblem. It's odd, because I once noticed what looked like a tube radio in the background of a show on Nickelodeon called iCarly and that radio also had a symbol like this on it.