As I understand it, in the early '40s AEG took over Siemens's share in Telefunken (and Siemens got AEG's stake in Klangfilm). I'm hardly an expert on this, though.

There's photos of the Luxussuper 54 here. My best guess is that the cutie you have there is an export version of the same radio, sans longwave. It looks like the model number is 1135W either way, based on this site.