In 1965, the final chapter of the fabled Royal 500’s was written with the totally different model N-G. I don’t know why they named it that, but maybe because compared to the previous Royal 500’s, this one was No Good! It was cheaply put together and performance took a big step backwards as the output was only half of the model H. Needless to say, this one is not sought after by collectors, except maybe as a filler to complete the 500 line. Sad way for this ledgendary product line to end. It did feature a lighted dial though by pressing the button on the lower right which was kind of nice.
I have a Zenith Royal 41 & it looks just like the 500 N-G, was it a later version?