[Radioroslyn]

Hello Claude,

I know of some sets that have oval dials. Just about all of the 1936 Philco line...  1936 (June 1935) - Philco Radio Gallery    January 1936 - Philco Radio Gallery   Or you could just buy the escutcheon, those show up on epay and fit it to a non Philco set with the proper dial dimensions. 

For those following at home this is what the original set looked liked  General Motors Radio Corp. Tube Radio-Model 253 | #32668654 (worthpoint.com)  And electrically  General Motors Radio Corp.: 253 (nostalgiaair.org) 

The cabinet will require the repair of the three holes in the front panel. I wouldn't bother with trying to find the GM chassis. Even if you did find one the shipping is going to be a pretty penny. It could be a very long search. It's early superhet curcuit using 2.5vac tubes crica 1931-32 design. If you move up a couple of years to '35-'36 tubes are more efficient and higher gain. SW reception is popular so the newer chassis are more likely to have a SW band or two.

These are just my opinions and as they say opinions are like elbows everybody's got a couple of them.