collection of TTL/CMOS chips, can anyone help identify?

[Scott Stevens]

On Wed, 17 Aug 2005 12:04:13 -0700 (PDT)
Tom Jennings <tomj at wps.com> wrote:

> On Wed, 10 Aug 2005, Unibus wrote:
> 
> >> Others, can not determine what they are. Any ideas? I can go back
> >and
> 
> >>  7504 ???
> >>  7506 ???
> >>  7515 ???
> >>  7517 ???
> 
> These could be date codes, BTW...
> 
I remember at one point having a bunch of TTL chips with 1974 date
codes, and how confusing it could get.