Unless I was 100% sure that the power cable couldn't be oriented incorrectly and the power cable was wired correctly I wouldn't want to touch a Hammond organ as there is a risk the chassis could be live. This could happen if the original outlet broke and was replaced with a non-polarized one. Although the playing surfaces are plastic or painted metal, there is exposed metal behind each drawbar which poses an electrocution risk if you touch it.? ?Better stay safe and put an IEC male connector on the organ.? Do an earth leakage test first to see if there are any problems that will need fixing as leakage (e.g. from the transformer) will trip a modern breaker.
