12AX7 CEI made in great Britain

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Can anyone clarify the origin of these CEI 12AX7 tubes I bought a while ago please ?
It has "CEI", "12AX7/ECC83", "Made in Great Britain" in 3 rows. it has grey ladder type of plate, a "O" getter supported by a pole.
The construction is almost identical to a pair of "Valvo" 12AX7 I have. It is also similar to some "Matsushita" 12AX7 in my inventory except that the Matsushita's "O" getter is at an angle because it is welded to the top plate at 1 point.
any help will be most appreciated

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Kimber Kable

Topic - 12AX7 CEI made in great Britain - OY_audio 13:17:06 02/01/06 (1)

Re: 12AX7 CEI made in great Britain - OY_audio 23:06:33 02/01/06 (0)

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