Thanks Bruce – pm sent . Mallory Yaxley lists the 10-12 , 10-120 as a type 20 and the Normandie as a type 50 – and RCC’s show all three as using the same circuit. I’m curious to know what the differences are. I don’t have factory schematics for any of them . Now I’ve seen a couple of 10-12’s – but what does a 10-120 look like – I’d like to know how many of these radios were produced since I’m on a quest to own one eventually.