According to a 1951 advertisement; precision.
At least that is what the advertisement claims is what a trick shoot golfer said. And if you cannot trust an entertainer who had both European royals and New Guinean head hunters among his audience, who can you trust?
That said, a lot of shavers I inherently trust more than a trick golfer thinks the Super Speed is a great razor, even if we’re almost seventy years after this advertisement was printed. And you can’t say that a razor for the price of twenty double edged blade isn’t a good deal… although that might say more about the price of the blades than the razor – a quick online search showed that today the same amount of replacement carts will cost you significantly more than a modern cartridge razor.