Pr Telefunken Vintage 12ax7/ECC83 Preamp Driver Tubes, Matching #s West Germany, Ex Sound, Strong

Pr of the very nice sounding vintage 1960s smooth plate Telefunken ECC83/12AX7 preamp driver tubes with matching batch numbers. They were made in West Germany and are considered by many audiophiles and musicians as the best sounding of all the ECC83/12ax7 type tubes. They were used as original equipment tubes by many vintage tube amp manufacturers, Mcintosh, Fisher, Scott, Leak, Dynaco, Sunn, etc. They have excellent lettering and have the engraved diamonds on the bottoms of the tubes, they are authentic. These are the smooth plate version, known for their excellent sound, open, detailed, dynamic, extended, smooth, involving, natural, transparent and very musical. They work well and sound superb in tube preamps and amps. They test strong on my B&K tube tester. The shipping cost includes safe packing, insurance and prompt shipping with tracking number. Both tubes on both sides test over 850, where 640 is minimum good. Buy with confidence, see my feedback. Good Listening, SonnY :)
PS: They are getting harder and harder to find.. See the matching vintage Telefunken 12au7/Ecc82s and 12at7/Ecc81s also listed on Audigon