(!!!!) (BEST PAIR) 5842=417A Western Electric NOS 1980 (39ma and 40ma)

1 pair) 417A Western Electric NOS original boxes 1 tube) 39ma Gm=30,000 printing partially incomplete - on right 1 tube) 40ma Gm=31,000   Matched on Amplitrex Good Ma range NOS 20-30ma Good Gm range NOS 20,000 - 30,000   - LAMM LP2 phono- Wavelength Signature 45 2004- Robert Koda Takumi K-70 power amp- Psvane T-417 Reference Tube Pre-Amplifier - Supratek phono