Made in Sweden by Standard Radio under RCA's licence (1950s).
Dark brown base, Muddy black plate included five supports around.
No hole on plate, Triple mica and double D-Getter.
One of singular of Swedish tubes ever made. In the top-five list of most wanted 6SN7 tubes
Nos, unused but no original box. Matched pair and quad are available.
Made in USA by Sylvania (1970s).
Black plate, Top O-getter.
Good tube.
Nos but no original box. Packed in white box.
Matched pair and quad are available.
Made in USA by Sylvania.
Metal base, half silver tube. Best of 6SN7 ever made in USA. One of the most treasured of the 6SN7 types and are characterized by excellent low level detail resolution, very immediate sounding with a lot of lower level slam. These are the same as the 6SN7W's
Nos but no box. Packed in white box. Matched pair are available