1851 Japanese-made perpetual clockwatch (Wadokei). Displayed in Tokyo National Science Museum. Taken in 2004.
<a href="https://en.wikipedia.org/wiki/en:User:PHG" class="extiw" title="w:en:User:PHG">User:PHG</a> at English Wikipedia
2004-12-24
<a href="https://en.wikipedia.org/wiki/en:Image:1851Wadokei.JPG" class="extiw" title="w:en:Image:1851Wadokei.JPG">Image:1851Wadokei.JPG</a> at English Wikipedia