This auction is for a UX-6653 / CV3592 Raytheon NOS Spark Gap TR Switch Tube. This tube was used for the SG radar, Date 1945. This tube is untested. Unopened boxes will be shipped. SEE PHOTOS.... If you have any questions or issues after receiving your item, please contact me prior to leaving feedback so that I may address them. I combine shipping on all of my auction sales. Shipping will be free in the U.S.