Now the owner of three vintage TTO Gilletes, I notice that the exposed blade ends on the sides of the heads (not the cutting edge) are of unequal lengths. I think I read somewhere why the ends were exposed - something to do with the ability to micro-adjust the blade edges with the safety bar to even blade exposure and ensure parallelism. But why the unequal lengths? Some engineering reason? So you can tell which side you just used in a pass during a shave? To better miss your ear? It is a puzzlement....