Need help

[coggid]

My grandfather recently passed away and we are trying to find out the value of an old tv he had.

It is a Zenith color, model 25T2968. I can't find a year on the tv anywhere.
I found an additional serial number written on the back of the console so not sure if that is from manufacturer or something else.
That second number is 4002043.

I appreciate any help anyone can offer on how to search this model and find out more about it.