Mullard 12AX7 date code 16L B91

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HOK

Does this mean the tube was made at the Blackburn plant in 1961?
Thanks
John

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Topic - Mullard 12AX7 date code 16L B91 - HOK 04:37:23 03/31/06 (4)

Pic... - HOK 07:57:55 03/31/06 (1)

Re: Pic of I61 B9I - Ron Oehlert 10:16:38 03/31/06 (0)

Re: Mullard 12AX7 date code 16L B91 - bonzodog 07:34:41 03/31/06 (0)

Re: Mullard 12AX7 date code 16L B91 - fatbottle 06:46:43 03/31/06 (0)

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