Some explanation how to read the time:
Hours "spiral pointer": The spiral crosses the numbers on the clock face. This gives you information about the current hour.
Minutes "normal pointer": The minute pointer works like an average clock. But there are no numbers for the minute pointer printed on the clock face.
There is also an alternative version with two spiral pointers.
Further details and sources at: https://www.thingiverse.com/thing:3955834