Made in USA by Western Electric
Super low noise triode, Mesh plate, Engrave base, 
Greatest driver tube for legendary Western Amplifier
Data here
Nos in original box. Matched pair and quad are available.

Made in USA by Arcturus. 
One of the oldest Medium-Mu Indirect hearter triode in the world.
Blue glass, balloon type, engrave base and mesh plate.

Nos but no box.  Matched pair are available.

Made in USA by National Union.
Medium-Mu Indirect hearter triode tube. Same as 227, 327.
Round black plate.

Nos in original box  Matched pair are available.

Made in USA by RCA. 
Medium-Mu Indirect hearter triode tube. Same as 227, 327.
Balloon type, engrave base and mesh plate.
Nos in original box.
Matched air and quad are available

Made in USA by RCA.
Medium-Mu Indirect hearter triode tube. Same as 227, 327.
Round black plate.

Nos in box. Matched pair are available.

Made in USA by RCA. 
Medium-Mu Indirect hearter triode tube. Same as 227, 327.
Balloon type, engrave base and mesh plate.

Nos in original box. Matched pair are available

Made in USA by RCA.
Medium-Mu Indirect hearter triode tube. Same as 227, 327.
Round black plate, engrave base

Nos in original box.

Made in USA by RCA. 

Black plate. Substitutes.........76 type

Nos in original box. Matched pair are available.

Made in USA by Western Electric.
Power Tetrode tube with smoke glass, O-Getter.
Require large nine pins socket like WE-437A.
Click here for the WE 418A data sheet.
Nos in original box. Matched pair are available.