Altec 639B

[Larry123]

Not mime, owner asked me to try and find out year of manufacture. Seriel # 1757. Thanks

[donaldpatten]

Hi Lawrence
I do not know if Altec used the EIA date code.
It is a four digit format: WWYY , two numbers for the week, followed by two numbers for the year.

Example : 1069 = the tenth week of 1969

You will see this code on caps , pots, xformers , etc and you can date a product buy its parts.

Don

[Larry123]

Thanks Donald, I will pass this info along to friend that inquired.