.. or thereabouts. I visit the exhibition weekly, and it it "works". Sometimes the hands get stuck, but after a few cycles it is back to doing it right.  I've fiddled with everything

• Added grease, that made it worse, clean grease off.
• Changed program to move the hands indvidually. The hour hand sticks more often than the minute hand (shorter -> less angular force when it is free to flop at almost the top point) and the slight vibration of the minute hand moving gets it going again.
• There is some flex in the mount of the gear to the clockface, tried with various ducttape arrangements to make it "tighter".

Finally noticed that when I test the clock (standing on the table or holding it) it works fine but not when hanging on the wall. The hook is fixed to the centre hole where the axis protrude. THERE is something that moves when it is hung up, causing more friction on the axis.

Solution was to change where the clock is hung. It is now hung from the frame and seems to be working beautifully.

(Edit 3 days later: Yes, still works.)