This goes back a ways...

I couldn't have been more than 7 or 8 when my evil older sisters made me watch a horror film that involved a disembodied hand.

If I recall correctly it involved a man that was trapped under water and they had to amputate his hand so he wouldn't drown. For some reason they kept the hand in a big jar. It escaped and chaos ensued.

I couldn't have been released after '77 or so, and I think it was black and white.

I need to see this now, so I can scare the **** out of my son

Thanks...