4 Tung Sol 12AU7 Electronic Vacuum Tubes. Smoke Glass. Start Price USD 49.99 Current Price USD 56.60 Time Left - Bid Count 2 Buy It Now Price - Reserve Price - Start Time Thursday, August 28, 2008 End Time Thursday, September 04, 2008 Location Pa See more about '4 Tung Sol 12AU7 Electronic Vacuum Tubes. Smoke Glass.' Description Up For Bid are 4 Tung Sol 12AU7 Electronic Vacuum Tubes, Made in USA. These have a dark smoke glass. I believe these are New/Old Stock, but not sure. These are box kept, but only 1 box is original. Tubes are untested. Check my feedback on tube sales. Also view my other ebay auctions for more Vintage Radio / TV Tubes & Equipment. If any questions, please e-mail. Buyer pays actual shipping cost. Thanks. Place a Bid!