<a href="http://mambohead.com/2011/05/nice-clock/">http://mambohead.com/2011/05/nice-clock/</a><div><br></div><div><div><div>It looks to me like the big hand is driven and the other smaller ones are a compound pendulum.</div>
<div><br></div><div>It moves a bit to gracefully for that (for me intuitively) given how smooth it is. Perhaps the period of the two small pendulums is very long and it has really good bearings?</div><div><br></div><div>
What do you think?</div>
<div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div><br>
</div>