Anyone identify this Mullard?

[jackinnj]

One I found in the bottom of my tube drawer:

 

[Tubelab_com]

How many pins? 9? I have several tubes that look like this, but the most common flavor is 6EJ7 or 6EH7.

 

[richwalters]

EF80, EF184; IF screened pentodes. Compare with my pic. My guess yours is E80CF group of specials which have a longer black getter.
ANyone else ?

richy

 

[jackinnj]

I put it on the flatbed scanner:

 

[DF96]

The etch code looks like Lt1 B9K, so it is an EF80 (6BX6) RF/IF straight pentode, intended for TV receiver IF amplifiers. Made in Blackburn in 1959?