Being a designer, and knowing how the machines work. And the actual, generic process of machining these days. A 3 piece razor head should not require more time in the machining department then a german Luger does.
And the amount of polishing...... I have dealt with the polishing department in a major world class auto company. I know people who can polish something like that in 5 minutes. No offense. but even if they polished it by holding it in one hand and rubbing it with a hanky,,, it would not need 6 hours to polish.