AutoStrop Safety Razor promises 42 shaves per blade
An advertisement extols the AutoStrop Safety Razor which sharpens itself, delivering about 500 shaves per dozen blades or an average of 42 satisfying shaves from each blade. It claims built in self sharpening that keeps a keen edge daily without disassembly and offers adjustable closeness for different shaves. New York AutoStrop Safety Razor Co. promotes a free trial plan.