Ink stamp on 1970s IC's.

From: Dave Dameron <ddameron_at_earthlink.net>
Date: Wed Jan 20 19:07:37 1999

Hi all,
I have seen several plastic DIP IC's from the 1970's have a white ink stamp
on them that
say something like "ETC 4" on them. (Your number may vary) Most are Intel
RAM's, but some are Signetics or National TTL. Before I have seen them on
chips on boards, but have now bought a bunch of IC's new in tubes which also
have this stamp.
Has anyone else seen this and know what it means?
-Dave
Received on Wed Jan 20 1999 - 19:07:37 GMT