BL63, OSRAM, , CV1102, VR102, 10E/279, MIL SPEC, BL63, AUDIO TRIODE, GEC SHAW, PRE-1948 MANUFACTURE, AS USED IN R1155, GLASS FRAGMENTS INSIDE ENVELOPE, VALVE TESTS FINE
BL63, OSRAM, , CV1102, VR102, 10E/279, MIL SPEC, BL63, AUDIO TRIODE, GEC SHAW, PRE-1948 MANUFACTURE, AS USED IN R1155, GLASS FRAGMENTS INSIDE ENVELOPE, VALVE TESTS FINE