NOS/New vintage USA RCA/Dumont 50C5 vacuum tubes, boxes. Dumont was a vintage USA electronics distributor and purchased tubes from the original manufacturers and then relabeled them with their logo. Relabeling was common practice with vintage USA/European tubes. These 8 are New vintage USA RCA Black plate 50C5s, very nice quality vintage USA 1960s quality, craftsmanship and performance. The shipping cost includes safe packing, insurance, prompt shipping and tracking number. Buy with confidence, see my feedback. Good Listening, SonnY :)