Seiko metronome. Picture created by <a href="//commons.wikimedia.org/wiki/User:PJ" title="User:PJ">PJ</a> April 10 2007. Camera: Canon EOS 300D, lens: Tamron 28-75 mm f/2.8
<a href="//commons.wikimedia.org/wiki/User:PJ" title="User:PJ">PJ</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>