A time lapse of a clock for one of my Nurse Practitioner's, she wanted it for her sons. I had a lot of difficulty getting it to run correctly, finally after a lot of alignment and adjustment and some lubrication got it running correctly. This is 4 minutes to one actual minute. It is boring to watch the whole thing, you can jump around and get a feeling how all of the gears are in motion.
Here is a link to the design. https://www.myminifactory.com/object/...