[Arran]

I don't think that this set was made by brand Z, the speaker looks a lot like a Rola and I don't think brand Z used those. The dial reminds me of some Sparton sets from the 1937 model year, though not quite as elaborate, I doubt whether Sparks Withington made this set however. Sears-Roebuck owned Colonial by then so the bulk of their Silvertone sets were made by Colonial, some by Stewart Warner, and others by Belmont. I noticed that there are windows in the dial with a label for each band printed on green celluloid (or maybe it's on the glass?), I wonder if those light up in sequence with the position of the band switch?
Hopefully you can find a good picture of that missing molding, or someone who has one, to make a replica of it. It looks like it was in a vulnerable position should someone tilt the cabinet forward so I'm sure that this isn't the first time that molding became detached.
Regards
Arran