Found this at a yard sale but I have no idea what it is – Thoughts?

Occasionally washing your clothing by hand is healthier for the environment. However, this approach could be time-consuming and labor-intensive. Another option would be to use a hand washing machine. While these cleaners don’t need power and use less water, their results are identical to those of electric ones. They are easy to use, might streamline your washing routine, and could even end up saving you money. It is worth mentioning that electric washing machines tend to be more costly than their hand-cranked counterparts.