bilbar

Responses from bilbar

Very early Mullard EL84s with O-getters?
Yes, I have explored the Tube Classics webpage. The 1954 Mullard coin base "1608 F4" tube there resembles what I have, but the getter-type is unspecified. Mine have halo getters, which I had always thought came after the squares and discs. 
Very early Mullard EL84s with O-getters?
Yes, I saw the news about Charlie.These are definitely EL84 tubes. The missing clues are the production codes. The closest I have found to a similar tube is a photo at tube-classics.de. That tube is Mullard-branded with factory codes indicating it... 
Very early Mullard EL84s with O-getters?
I should clarify, these tubes have a glass base. 
Very early Mullard EL84s with O-getters?
Thanks for that tip! I have some photos of them on photobucket. Can I post links here? 
Very early Mullard EL84s with O-getters?
No, these are 84s. I guess my question comes down to: can a European EL84 tube from 1954 have a halo getter?