During 1918 and 1919 Gillette's chief engineer William Nickerson authored a sort of memoir for the Gillette employee magazine The Gillette Blade . This excerpt (January 1919) covers the crucial period during which the razor finally reached commercial distribution in 1904 and makes for fascinating reading (13 pages). https://drive.google.com/file/d/1tQ_TbOCC_qX0obs0zv7EN0XOgBYRs84q/view?usp=drivesdk