This is a charming bit of 1950s advertising. Hold-Bob bobby pins were endorsed by John Powers, founder of a famous modeling agency and a world-famous beauty authority. Wow!
I can't imagine either having this kind of hairstyle or taking the time and effort to achieve it. How long do you have to sit around before you can take the pins out? Do you sit under one of those helmet-type hair dryers? Would you do this every day?
This is wheel is seven inches across and in very good shape. It's one of my favorites. I think it's pretty clever.