Made in USA by RCA.
Balloon type, long engrave base.
One of the great classic triode tubes.
Used but tested excellent as new tube.
Matched pair and quad are available

Made in USA by RCA.
Balloon type, short engrave base.
Similar to 01A, 201A version. One of the great classic triode tubes.
Nos in original box.
Matched pair and quad are available .

Made in USA by RCA.
Silver tube, engrave base. Similar to 01A, 301A in balloon type.
One of the great classic triode tubes.

Nos in original box.

Made in USA by RCA.
The balloon type, engrave base. 
One of the great classic triode tubes
Used but tested excellent.
Matched pair and quad are available.

Made in USA by RCA.
Triode Detector Amplifier tube with 5 VDC filament.
Silver plate. Very good for driver.
Data here
Nos in original box. Matched pair are available.

Made in USA by Raytheon.
Triode Detector Amplifier tube with 5 VDC filament.
Silver box plate, Engrave base.  Bottom Cup-Getter. One of the best 12A ever made. 
Data here
Nos in original box. Matched pair are available.

Made in USA by RCA.
Triode Detector Amplifier tube with 5VDC filament.
Engrave base, silver plate. Very good for driver.
Data here
Nos in box. Matched pair are available.

Made in W.Germany by Telefunken. 
Diamond Logo on the bottom, Great of 12AV7 / 5965.
Best choice for Conrad Johnson Pre-Amplifier.

Nos in original box. Matched pair are available.

Made in USA by Sylvania 
Long gray plate, O-Getter and gold pins.
The best of 12AV7 / 5965 ever made from USA.

Nos but no original box. Matched pair are available.