Details
New old stock ruggedized octal beam power tube. made by TungSol, but could have other US brandings, as TungSol was the only US maker of these until they ceased manufacture in 1967. These have lower ratings than 6L6GC tubes, but higher ratings than most of the rest of the 6L6 family. These are often used in Fender amplifiers.
NSN/FSN = 5960000988793, 5960001346838, 5960002393052, 5960002620161, 5960005534361, 5960005561277, 5960005781517, 5960006155641, 5960006173205, 5960006174917, 5960006179176, 5960009966898, 5960012087250