My grandfather was a sucker for electronic gadgets. He probably used whatever electric shaver that came out at the time that he could afford. Like most electronic devices and appliances in this country... the ones made in the 1960's and 70's would outlast anything made today. He probably had an electric shaver for all of the time that I knew him. Before that, he had to have used a DE of some kind..... probably a Gillette. He was always clean shaven.
Ben
Ben