Old Spax7 Tubes

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tjstrat

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I'm trying to date and identify the manufacturer of a non sleeved SPAX7 I have... This is NOT the old Sylvania SPAX with the military style stamp that came in my old '88 MkIII, nor is it the bold black typeface that the pre sleeve versions came with... the ID is printed lengthwise on the side of the tube in non bold characters. Ideas on country of manufacture and age?
 
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