What would you say are the milestones? 1880's - the first safety razor 1940's - TTO 1950's - adjustables 1960's - stainless steel razors
Gotta stick in the loss leader innovation there somewhere. "Give them the razor, and they will buy the blades." Unfortunately still practiced today. :rofl
Don't know the exact date .....but I would say the internet. Gives me loads of choice....and taught me how to shave properly!!