Made in USA by RCA.
Single plate version. muddy black plate, engrave base, Bottom Pan-Getter. 
Supper sounding. One of the best 2A3s in the world.
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Nos but not box. Tested very strong and matched.

Made in USA by Sylvania (1940s).
Twin mono plate inside black glass. Bottom Pan-Getter.
Very very good type. Sweet and balance sounding.

Nos in original box. Matched pair available.

Made in USA by RCA.
Single plate version. muddy black plate, engrave base, Bottom Pan-Getter. 
Supper sounding. One of the best 2A3s in the world. If you think that all 45 tube more musical than 2A3s. You will change your mind after enjoy this version.
Nos but not box. Tested very strong and matched less than 1%.

Made in USA by Sylvania (1950s)
Gray plate. Bottom D-Getter. Good tube.

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

Made in USA by Sylvania (1940s).
Muddy black plate. Bottom Pan-Getter.
Very nice tube. Sweet and balance sounding.

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

Made in USA by Sylvania (1940s).
Special version of 2A3s made by Sylvania for U.S.Army.
Big brown base and smoke glass. Super rare and super long life.

Nos in original military paper box.

Made in USA by Arcturus.
Black plate. Bottom D-Getter.
Very good midrange detail and soundstage. Super tube.
Engrave base or orange print.
Nos but some no original box. Tested matched pair are available.

Made in USA by Arcturus.
Muddy black plate. Bottom Pan-Getter. 
One of the first and super rare version of 45s family from USA with smoke glass.
Very good bandwidth, bass, midrange detail and soundstage. Super tube.
Nos in original box. Tested matched (less than 1.5%)

Made in USA by Arcturus.
Blue balloon type with Ribbed black plate. Bottom Pan-Getter. 
Super rare tube. One of top-five list of most wanted 45s tubes in the world.
Very good bandwidth, bass, midrange detail and soundstage. Super tube.
Nos in original box. Tested very strong.

Made in USA by Arcturus.
Early version of blue tube from Arcturus with Ribbed black plate. Bottom Cup-Getter. 
Super rare tube. One of top-five list of most wanted 45s tubes in the world.
Very good bandwidth, bass, midrange detail and soundstage. Super tube.
Used. Tested very strong.