All of them have different handles and mechanics. They are surprisingly sturdy and efficient, especially considering that some are from the 1920's. I don't use these, they are stored away for someday when I have a great place to display them. There is one I keep in my kitchen and use nearly every day, a good friend of mine almost past out one day when I whipped it out to use. She had never seen anyone actually use one.
The yellow handled one is my favorite, I have a thing for yellow. Mostly I love thinking about the woman who used to use each one. Did she have a variety to choose from when she bought it. You can almost imagine her excitement at having such a cutting edge kitchen tool to make her life so much easier. She probably set right out to make an angel food cake from her fresh eggs just to get to beat the egg whites with her modern gadget.