Made in USA by Tung-Sol (1930s).

Made in USA by RCA (1930s).

Engrave base, muddy black plate. Bottom Pan-Getter.

Used but tested like new. No box. Matched pair and quad are available.

Made in USA.
The premium of 45 in balloon type.  
Engrave base, Muddy black plate. Bottom Cup-Getter.
Super rare version. Hard to find
Used but test as new tube. Matched pair are available.

Made in USA by RCA (1930s).
Engrave base (Marked Cunningham in Wizard box)
muddy black plate. Bottom Pan-Getter. One of the first version from RCA.
Best sounding of RCA 45.
Nos in original box, Never been used. Opened for take picture only

Made in USA by Sylvania
Special seri of #45 tube type with larger body like 2A3.
Muddy Black Plate. Bottom Pan-Getter.

Used and tested good. Matched pair are available. Less than 3%

Made in USA by National Union.
Muddy black plate, Engrave base
Special Low-Mu Power Triode.
Characteristics and Typical Operation similar to 45 but use 5 Volts filament.
Used but tested as new. Matched pair are available.

Made in USA by Sylvania.

Made in USA by Nationa Union.
Black plate, Clear glass. Twin mono plates version.
Very good tube.

Nos in original box. Matched pair and quad are available.

Made in USA by Tung-Sol (1958).
Twin mono plates, black glass. Bottom Pan-Getter.
Very very good type. Sweet and balance sounding.
One of the best 6A3 from USA.
Nos in original box. Matched pair are available. All same date code

Made in USA by RCA.