This sale is for a 1237 NOS Sylvania Electron Tube for the #14 & #16 American Flyer Train Rectiformers. TV-7D/U tested. The tube Tested very good at 55.1 / 55.9, Minimum 40.o / 40.0. 1The tube box is in very good condition. SEE PHOTOS.... I used my TV-7D/U tube tester with digital meter for testing this tube. If you have any questions or issues
after receiving your item, please contact me prior to leaving feedback
so that I may address them. Free shipping in the U.S.