Made in USA by Raytheon.
Balloon type. Similar to 26 and 326.
These are the earliest type with “Raytheon” stamped on the silver box plates. 
They are known as 4-pillar tubes.
Like new tubes in good testing. Matched pair are available.

Made in USA by RCA.
Balloon type. Similar to 26 and 326.
Silver plate. Medium-Mu Direct hearter triode.

Like new tubes in good testing. Matched pair are available.

Made in USA by RCA.
Balloon type, Silver plate, Engrave base. Packed in Silvertone box. 
Medium-Mu Direct hearter triode. Similar to 26 and 326

Nos in original box.

Made in USA by General Electric.
Silver plate. Medium-Mu Direct hearter triode.
Very good for driver and Pre-amplifier.

Used but tested as nos tubes. Matched pair are available.

Made in USA by General Electric.
Silver plate. Medium-Mu Direct hearter triode.
Very good for driver and Pre-amplifier.

Nos in original box. Matched pair are available.

Made in USA by National Union.
Silver plate. Medium-Mu Direct hearter triode.
Very good for driver and Pre-amplifier...

Nos in original box.

Made in USA by RCA.
Medium-Mu Direct hearter triode. Similar to 226 and 326.
Silver plate, Engrave base.

Nos in original box. Matched pair are available.

Made in USA by RCA.
Balloon type, Silver plate, Engrave base.  
Medium-Mu Direct hearter triode. Same as RCA UX-226. Similar to 26 and 326

Nos in original box. Matched pair are available.

Made in USA by RCA.
Medium-Mu Direct hearter triode. Similar to 226 and 326.
Silver plate, Engrave base.

Used but tested as nos tubes. Matched pair are available.

Made in USA by RCA.
Balloon type, Silver plate, Engrave base. Packed in Silvertone box. 
Medium-Mu Direct hearter triode. Similar to 26 and 326

Nos in original box.