The last section of this web page gives some information. One portable TV designed in Australia had a live chassis, the other live chassis sets were modified imports of UK and USA sets.
http://members.iinet.net.au/~cool386...n/foreign.html
One other point about USA TV sets was that many used voltage doubling for the HT line therefore using both half cycles. An interesting design was the use of, I think, the sound output valve to supply lower HT to parts of the set requiring lower voltages. The sound output anode was supplied by the higher HT and the cathode circuit fed the lower voltage part, well decoupled.