Taking a real close look at the pictures it appears that the motor only has 2 sets of windings, but the 127V section of the voltage selector has a resistor fitted somehow, so the 110V windings can work at 127V. A radio freak who was at the flea market told me that until the 1950ies Vienna had 110 and 220V AC as well as 220V DC, which actually used the same unpolarized ungrounded plugs. The only thing I'm not sure about is whether he was talking about 127V 3ph or actually 110V single phase.
He also told me that Eumig still made DC only radios in the early to mid-50ies that could be dumped 10 years later because DC was no more...
