Short Claymation like film

Cross-posting this to "I need to know", "Short Films" and "Animation" in the hopes that SOMEONE, SOMEWHERE will remember this short (maybe 7-10 minutes) film...

I saw it in the mid-70's...maybe 74 or 75...because I know I was still watching Sesame Street at the time, and I don't think I watched it regularly much past age 6....

It was a black and white "Claymation-like" film of a little man who was working on a potter's wheel making a vase....

all of a sudden this BIG HAND (no body...just a hand) appears, smooshes the vase on the wheel and turns it into a hand. The little man turns it back into a vase, and the big hand smooshes it again...this goes back and forth for a bit and then the big hand proceeds to chase the little man around his house...eventually "Killing" the little man by smooshing him.

I know I'm not crazy, because my little sister remembers the same thing.

I also do not think it was a Wil Vinton short, because looking back, it seemed much much older...

Any help on the title, creator, and where it might be found to view would be much appreciated.