I acquired these tubes at auction back then, around the time I was repairing and tinkering with LUX amplifiers. They were intended as replacements for 6BQ5 tubes. They were listed as selected and matched. (※I no longer have a tube tester, so I cannot guarantee the quality or provide numerical values as of now.) The case is also well-designed and looks nice. I gave away the amplifier before I could replace the tubes, but I kept them, thinking I might want to build one myself someday. My interests have changed, so I'm putting these up for sale. I recall these were higher voltage tubes than 6BQ5. Please research for more details. Search terms: 6BQ5 EL84 7189 Vacuum tube Matsushita National