Made in G.Britain by M.O.V.  
The first version which was special designed for British's Military in 60s.
Long and large muddy black plates, Triple mica and D-Getter. This version makes balanced sound, smooth and detailed. Best of 12AT7 / ECC81 in the world.
Used in military paper box.

Made in G.Britain by M.O.V.  
The last version which was special designed for British's Military (70s - 80s).
Long and large muddy black plates, Closed getter. This version makes balanced sound, smooth and detailed. Best of 12AT7 / ECC81.
Nos in original box. Matched pair are available.

Made in USA by General Electric.
Good.

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

Made in G.Britain by Mullard (1960s). 
Copper supports. Very good tube.

Nos in original box.
Matched pair are available.

Made in W.Germany by Siemens. 

Special version. Very nice tube. Good sonding..

Nos in original box. Matched pair are available

Made in G.Britain (1980s).
This is the Famous Mullard 12AT7.
Some of the last ones left, these are great sounding with that old European heritage.

Nos in box. Matched pair are available.

Made in G.Britain by Mullard (1960s). 

Copper supports. Very good tube.

Nos in original box.

Made in G.Britain (1970s).
This is the Famous Mullard 12AT7. Some of the last ones left, these are great sounding tubes with that old European heritage.

Nos in box. Matched pair are available.

Made in Hamburg - W.Germany by Valvo.  
Gold pins, Pinched Waist, Triple mica and O-Getter with double support. Some marked Valvo 6201 with blue print but they are the same. One of three highest grade 12AT7s (GEC A2900, Valvo 6021, Telefinken ECC801S, ). Great bass control and sweet midrange, very musical. Long life tube. Nos in original box. Matched pair are available.