Ultra-Rare Matched Pair 1950s ‘56 Philips Dario E80CC – Pinched Waist / Foil D-Getter – Gold Pin – Fully Tested TV-2 Baseline (100%+)

The Absolute Holy Grail of European Audio Glass

Up for sale is an investment-grade, historically significant matched pair of 1950s Philips Dario E80CC / 6085 dual triodes. Manufactured at the legendary Philips factory in Heerlen, Holland, these feature the earliest, most sought-after Pinched Waist glass envelope configuration, Gold Pins, and the massive Foil D-Getter structure.

Laboratory-Grade TV-2B/U Test Data

This pair has been rigorously evaluated on a calibrated, military-grade TV-2B/U Electron Tube Tester. Unlike hobbyist testers, the TV-2 is a true laboratory instrument displaying direct Percent Quality, where 100% represents a brand-new, nominal factory-spec NOS tube.

The results show a flawless, elite-tier match that is an absolute dream for reference stereo amplifiers and high-end headphone setups:

• Tube 1:
• • Triode 1: 102%
  • Triode 2: 98%
  • Perfect 4% internal section balance.
• Tube 2:
• • Triode 1: 104%
  • Triode 2: 100%
  • Perfect 4% internal section balance.

Tube-to-Tube Matching: The two envelopes track each other nearly perfectly (averaging 100% vs 102%). This guarantees completely symmetrical gain, identical transient response, and a razor-sharp, dead-center stereo image across your left and right channels.

Authenticity & Provenance

• Brand: Dario (The elite French commercial label for the Philips network, utilizing the exact same premium Heerlen internal architecture).
• Physical Specs: Pinched waist, pristine gold pins, intact flashing, early foil D-getter.
• Codes: Factory etched codes WK5 (delta)6j2 confirming authentic October 1956 Heerlen, Holland production.