All true, but I think the razor blades also were being changed circa 1930. The old 3 hole blades for the Old Type and the New Improved would NOT work in the NEW of the 1930's.Oh come on. First there was just the "Gillette razor", then they changed it a little and called it the "New Improved", then they had to change the design completely because the old patent was running out and called it the "New". makes perfect sense to me.