[sdiy] Identification of 1970's logic parts?

[Monty Brandenberg]

Googling and usenet haven't paid off; maybe someone on the
list can help me identify some logic parts dating from
1970.  I'm doing some reverse engineering on a Triadex
Muse for documentaiton purposes but it uses a family I've
never encountered.  Functions appear to be similar to ttl
(gates, hex inverters, flipflops).  Packages are standard 14-,
16-, and 24-pin dip.  Manufacture date is 1970.  Logo is an
outlined box with small 's' inside (LSI?).  Given loads
and resister pull-up values, logic can sink quite a bit of
current.  Power supply is a bit outside of standard ttl
spec (running about 5.6V).  Some inverters/drivers are
used to sink current from a separate 3+V supply.  Devices
I'm trying to track down are:  TR1001, TR1004, TR1005,
TR1006, TR1007, TR1008, TR1009, TR1010, TR1011, TR1014,
TR1016, and TR1023.  Might be a private labelling but I'm
hoping not....

tnx

--
Monty Brandenberg