I have an old treadle sewing machine that won't open any more. It use to. I can't remember if there is something I'm suppose to do besides just opening the top. The top seems stuck and I don't want to break anything. Is there a lever or something underneath? Thanks

Hi, briarbutterfly2!

The way to open it might depend on what brand and model it is. What brand and model is it, please?

Thanks!