The 1947 to early '49 looks like this.
https://www.flickr.com/photos/advance-design_parts_co/11597349184/in/album-72157631868452754/
The 49-53 version looks like this.
https://www.flickr.com/photos/advance-design_parts_co/15295057304/in/album-72157631870734114/
There is no bezel, the reason being is the light for the switch is visible around the circumference.