2 NOS Vintage Sylvania / Philips 6SN7 GTB Tubi Aspirazione Base Monete Preamplificatore HiFi Amp
For sale are are the 2 tubes as pictured and titled. Due to this, I have no idea the exact year they are from, but I’m guessing the 70’s. The tubes’ test results are displayed in the photos (New 6SN7 Spec 100% = 2,600 Gm).