The top of the cabinet is shot. Major chipping of veneer along the edges, as well as warped and lifting areas. Mere sanding isn't going to replace all the chipped-off missing pieces.
If I had to restore the cabinet -- and I have fixed worse ones -- I would completely remove the top veneer layer and replace it, then refinish the entire cabinet in lacquer.
It's not rocket science, and the rest of the cabinet looks like an easy refinish (after you remove the chassis and picture tube and mask off the speaker grille, of course).
If you don't want to pay someone to do it, you can send me email via
http://antiqueradio.org/contact.htm and I could give you more specific advice on how to do this sort of thing.
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html