We cannot be certain, but an image search leads us to believe this may be a 1942 General Electric LF-115 (or similar model) radio dial escutcheon. Comes in four 4 discrete pieces shown here placed together - it is not one integrated part. The top and bottom are metal while the two end pieces seem plastic. It's a "two-holer" escutcheon, with a window for pushbutton presets. The remaining dials went through the cabinet itself below this surround. Probably an SW / BC / FM console model.

About 13' by 6" O.D.