2C51 396A Western Electric 1949 3 Flat Black Plates Square Balanced Triodes Tube

This tube is a Western Electric 2C51/396A triode preamp tube. This is a early variant 1951 tube with three black plates, the middle one being super thin, with a slightly angled square getter on top that is identical and construction to five known military tubes from slightly later than this tube, that I sold recently.

Quad (4) of Telefunken DYNACO 12AX7 Tubes Smooth Plates Closely Matched ECC83

These are the original 12ax7 tubes from a Dynaco PAS-3X preamplifier. They have approximately 85% of their life remaining. I tested these on two separate tube testers, and all measurements were confirmed. Each side of each tube measured 84 or 85 percent out of 100. They are very closely matched. Safely packaged and quickly shipped.