I got a Frenzel FM-DP1 Preamp in the mail today, wasn’t supposed to arrive until Tuesday (score #1 ). The first thing I always do is check the glass to see if the tube fairy left me a surprise. V2, Tung-Sol 12AY7!? (Score #2 ). What could possibly be in V1?... JJ . Oh well, can’t win em all. I’m thinking it’s from the 50’s. Square getter. The thing is, I’m not sure it’s really a Tung-Sol. I think it may have actually been made by GE. The “12AY7” lettering looks the same as my GE (not that that’s conclusive evidence). I’ve read GE made AY7s for a lot of other brands. There’s not much info on these. I did find a Tung-Sol labeled 12AX7 that looks very similar but the “12***” lettering was the type in a rectangular octagon (not sure that’s important). Anyway, I’m willing to bet dollars to donuts at least one of you guys can help me ID this little gem.