Listening to what appears to be a Sylvania 6SN7GT (beige-lettering on its base, weird) with either a Tung-Sol 7236 (white-lettering) or a RCA 6AS7G (silver-lettering, 4-09 date code) as the power tube. Mid-size bottle having 939 and J8A as its date codes, so it appears to be from 1949 (39th week). Looking at its getter, one could think that it is a chrome-dome, but that appellation is usually reserved for early '50s 6SN7GT's. Don't care, as I took a flyer on this untested tube and got it for cheap. As for its sound, this tube has a pretty impressive soundstage and is slightly crisper sounding than the smoother-sounding '54 Sylvania 6SN7GTA I have.