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Re: amperex el84 date codes

Addendum: Re-read the first post; with the world logo 12/69 date is confirmed. Munich plant didn't add the week-of-the-year 4th character digit until mid-'60s, later than most Philips, BTW.

There may be a later (e.g., 1970-71) date from when the Amperex logo was screened as well.


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