15 Piece Vaccum Tube Electron Radiotron RCA, Tung Sol Sylvania Replacement In Lot"2 - RCA 6BZ63 - RCA 6BC8 (one tube in box labeled 6BC8 tube is labeled 6BZ7)2 - RCA 6BF51 - RCA 6AL5 (Tube labeled EL95)1 - Raytheon 6S4A