Where to find "Vintage Hi-Fi Spotter's Guide". Paste the web address at the end of this comment into your browser and "click". Didn't even know Chuck had them up on a website! There are also some newer books offered by Chuck. I would recommend these to everyone seeking to learn more about vintage and collectible audio. Thanks, Brian, for researching this for me, and "Clueless", keep that Westinghouse range warm...:-)
http://www.vacuumtube.com/hifi.htm