Who knows about Zenith Royal R TVs?

ok,i may have found a television that's WORKING (has picture but no sound) that i've been able to talk my girlfriend into letting me get.but how hard are these things to work on?if i could get it working,that'd be great for me.but i havent been able to get a look at it yet,so if i cant get it working, would anyone be interested in the chassis? thanks in advance for your help.i'll try to post a picture.
-frank