Vintage Hard Candy molds

I know that these molds were used to make hardy candy lollipops long ago. I have no information about who made them? When? Worth? How to use them? Clean them? or anything else about them. I have wanted to clean and use them for a long time however my mother was not able to pass that information down to me. There are about 40 different sets (currently only 1 in my possession) all different with different numbers stamped on the sides of them. Any info would be of great help! Thank you!!!!