Or even the later Schick injectors... 60s, 70s, 80s... Looks like the hood is just a 90° bend over? Just a thought. I have two of the first variant Fashion Razors and they have the hump as well. Oddly, it seems to work great on my head but takes a lot of paying attention to and redoing strokes on my face, as is the case also with the Bunny V2. Maybe because on the head, I'm shaving in a different stroke direction? I don't know. The hump just seems to work great on the head but not so much on the face.