A variety of vacuum tube sets, including brands such as Matsushita, GE, and NHK. - Brand: Matsushita - Brand: GE - Vacuum tube type: Vacuum tube - Brand: Electro-Harmonix - Brand: NHK - Brand: Matsushita - Vacuum tube type: Vacuum tube Thank you for viewing. Some are unusable and some are usable, and I am not knowledgeable enough to judge. However, I thought that some people might be able to judge based on appearance, so I will put them up for sale for a while.