*****SELLING WORLDWIDE*****
  PLATINUM MATCHED MATCHED PAIR TUBES (well-balanced triode-triode & tube-tube in transconductance and plate current).
>>>> PAIR AMPEREX Made for PHILIPS MINIWATT  12AX7 ECC83,Made in Heerlen factory,the same date code delta 3F1,73-88% PRINT VISIBLE.TUBES ARE SUPPLIED IN MINIWATT BOX.THE LOGO/LABEL IS WELL TAKEN CARE OF.
****TWICE TESTED;
      1st)NO SHORTS,NO GAS AND VERY STRONG TRANSCONDUCTANCE.
      2nd)TUBES ARE NOT USABLE UNLESS AUDIO TESTED WITH NO HUM and NON-MICROPHONIC USING MODIFIED DYNACO PAS 3 & TUBE OTL.
*****Having,
TUBE1) 50/50  & 5.3/5.2 ma 
TUBE2) 50/54  & 5.2/5.6 ma     Where 32/32 is minimum with Dan Nelson's newly calibrated NATO specs Lorenz TV7.
*****TUBES WITHOUT TEST DATA IS NOT SOUND DECISION & LISTING  ADS THAT SAY'S "TEST GOOD" or "TEST STRONG"  WITH HIDDEN TEST RESULTS IN VACUUM TUBES IS NOT ENOUGH AND AVOID SURPRISES.
*****Whatever  customs declared amount is what you get if item get lost.
*****QUESTIONS ARE ALWAYS WELCOME.