Model: Mullard EF86 6267 (Made in United Kingdom). Date code(s): 9r1 B8 B (9r = EF86 long plates, B = Blackburn,8 = 1958, B = February). This set was tested and certified by RoeTest V11 tester with the following result.
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1960s MAZDA PRODUCTION. 2 X EF86 TUBE. % EMISSION (EM) % TRANSCONDUCTANCE (GM) mA GAS.
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EF86 Mullard. Valve / Tube. one or more item from.
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CV4085 EF86 Valve Tube. GEC, British Made KB/Z. Fully Tested on AVO VCM 163.
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