Per my post above, friend has received the B2 set ex-eBay from Australia and has it on the air. It needed two tubes and a couple of capacitors but otherwise is quite the testimony to quality that it would fire right up and work well 75 years later. He's been making contacts on 7050, he has a too-short YouTube video about it here:
https://www.youtube.com/watch?v=93rVxSCbMpY