Made in England by Brimar.
Black glass, black plate, black base. Second version with no wing on the top.
Very good tube you can find. Strong bass, wide midrange and soundstage.

Nos in original box, Matched pair are available.

Made in England by Brimar (1950s).
Clear glass, black plate, black base.
Very good bandwidth, bass, midrange detail and soundstage.

Like new (90%), Tested good and matched. Matched pair are available.

Made in England by Brimar (1960s).
Clear glass, gray plate, black base.
Very good bandwidth, bass, midrange detail and soundstage.

Like new (90%), Tested good and matched. Matched pair and quad are available.

Made in England by Brimar (1960s).
Black glass, brown base.
First version with double wings on the top.
Great tube from Brimar with super sound.
Nos in original box. Matched pair are available.

Made in England by Brimar (1960s).
Black glass, brown base.
First version with double wings on the top.
Great tube from Brimar with super sound.
Nos in original box. Matched pair are available.

Made in England by Brimar.
Clear glass, brown base.
First version with double wings on the top.
Great tube from Brimar with super sound. Deep bass.
Nos in original box.

Made in England by Brimar.
Clear glass, brown base.
Second version with no wing on the top.
Very nice tube from Brimar with super sound. Wide widrange.
Nos in original box.

Made in G.Britain by Brimar (1960s).
Brown base, round plate, Bottom D-Getter. 
Very nice tubes from UK. Very warm and immediate sounding. 
One of the nice 6SL7s ever made from EU. All same date code
Nos but no original box. Packed in white box. Matched pair are available.

Made in G.Britain by Mullard.
Nearly same as 6SN7 type.
This is the black base version, smoke glass.
Nos in original box.
Matched pair are available.