These were used primarily in 1937 Zenith radios. This was tested on our Jackson 648S tester, and the picture show there is even brightness over the entire display (indicating an unused tube). Tubes are guaranteed for 30 days from the day of receipt. We have thousands of tube types in stock.
We always declare the sales price, as required by law. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets".
The seller is "vacuumtubesinc" and is located in this country: US. This item can be shipped worldwide.