Mind-boggling

[Simpo Two]

No matter how good your timepiece is, this wins: nuts:

http://www.my-time-machines.net/astro_05-18a.htm

[Sporky]

That'd need quite a strap.

[Simpo Two]

Sporky said:

That'd need quite a strap.

There isn't a thread for clocks; this was the nearest...

[Sporky]

It is jolly impressive.

[Dohnut]

No step tracker?

I'm out.