One platinum matched pair (2 tubes), genuine E88CC Telefunken, tested very strong, 95%!
The same date codes, made in Ulm plant, West Germany. Perfectly balanced pairs, all four triodes within 5%!
Very strong pairs, a lot of life left in them, years, even decades of music in some decent preamp.
Tested with 100V on anodes and -1.5V on grids, 100% is 16.5 mA: (17/16) (16/15) mA