A clock with a <a href="https://en.wikipedia.org/wiki/24-hour_analog_dial" class="extiw" title="en:24-hour analog dial">24-hour dial</a>.
<bdi><a href="https://en.wikipedia.org/wiki/en:Paolo_Uccello" class="extiw" title="w:en:Paolo Uccello"><span title="Italian painter (1397-1475)">Paolo Uccello</span></a>
</bdi>
<span class="int-own-work" lang="en">Own work</span>, <a href="//commons.wikimedia.org/wiki/User:Jebulon" title="User:Jebulon">Jebulon</a>, 4 June 2011