e86c 6cm4 ec86 tube NOS Siemens Germany quad tubes preamp gold pins trimica, O getter 

4 tubes e86c Siemens Germany gold pins, triple mica , O getter 

tested strong on tube tester tV7D/U = 64/65/66/70 (reference good at 50) 

codes H6 9k (three tubes) and one tube H9j 

box 174