[Arran]

There is nothing cloned about the radio chassis. It's purely and simply an RCA Radiola 62, as supplied to Brunswick. They used the big RCA dynamic speaker, derived from the RCA Loudspeaker 104. These sets have good sound when you have them working properly.

But who built them, was RCA building their own sets by then? Normally it was either G.E or Westinghouse that built everything for RCA prior to 1929 so I thought maybe Brunswick and American Bosch may have been building them under license. If it's a Radiola 62 then it's basically the same set as my Canadian Westinghouse model 89, with the exception of the added tone control switch and a few extra bits.
Regards
Arran