Pr of excellent sounding vintage Raytheon 1950s 6SN7GT preamp driver tubes, black plates, D getters, support rods sounds excellent, open, dimensional, dynamic, involving, transparent, smooth, natural and musical.1 Tube is relabeled Dumont but clearly a vintage Raytheon that is NOS with box, the other identical tube is labeled Raytheon and test very strong and balanced, they are identical to each other, 1950s, USA. The NOS tube tests new and the used tube tests 900/910 where 640 is minimum good, very strong and balanced.  They have the incomparable vintage USA Raytheon design, craftsmanship, attention to detail and performance. The shipping cost includes safe packing, insurance, prompt shipping and tracking number. Buy with confidence, see my feedback. Good listening, SonnY :)