Information from the Copenhagen Museum about the clock that was designed and calculated by Jen Olsen:
- Jens Olsen designed and made the calculations for the clock. He also began the clock’s construction but died before its completion.
- It is the most accurate mechanical clock in the world and is surpassed in accuracy only by atomic clocks.
- Has the slowest turning gear in the world which makes one revolution every 25,753 years.
- Is wound once per week.
- Has been gilded with four kilos of gold.
- The clock has 12 movements and 15,448 parts.