There is a TDA7088
theres also an NTE7088 which is an audio amp.
This can used to be an alternative package for many
well known ICs but you dont see them much since
the early nineties.
You could try 'Webcrawler' and try it with and
without the 'K' suffix, it might take you a while to
drag through the results.
The letters were often changed to reflect the packaging
but the number was usually the same.
I don't recognise the description of large 'C' with a
small 's' in it, maybe you could draw it, someone may
recognise the logo.
Best of luck with it, John