Please look a the bottom of the instructions. To read the time, the hour is the circled number on the giant cog. The minutes are determined by adding up the numbers next to the top marbles of each column (an empty column is zero). Example- 3 is the selected number on the cog, the top marble on the first column is 40, the second column 15, and the third 1. The time would be 3:56. I would say this is the most fun clock to watch. It's a lot more entertaining than two/three hands going around in a circle. :D
Thanks to Greenyman for the art (I will be assuming) I don't believe Helkama did anything, possibly changed the sound, but I can't find any change I completely recoded this so that it works as I assume intended, while there would be an easier way to do this, I tried my best to get this up and running once more.