Hi

Just curious to try to date various 604e units I have.

I've seen two differing labels and 'names'.

ALTEC
Model 604e
Duplex

With codes of(under HF cover) 391505


and


Altec
Lansing
SuperDuplex
604E

With codes of 391949, 391239, 391648


These date codes seem to cross over each other in the 60's.


Also with 288C's, some I have the larger writing on the rear cover with ALTEC, then Lansing Corporation under it. Others have smaller writing ALTEC and Lansing.

Can anyone shed some light, especially on the 604s.

Nat