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Production date for a pair of AR 4x


Hanglow

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I'm trying to find a production date of the AR 4x serial #FX 121457-121458

Greetings:

The best data available today comes from examining the date stamps on the drivers and capacitors and choosing the most recent. Serial numbers 118,080 and 124, 686 both contain parts with the latest dates of 22 week of 1967. That was at time when these were coming off the line at a fast pace.

Cheers,

John

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