Musée des arts et métiers, Paris.
Xavier Sayanoff <a rel="nofollow" class="external text" href="https://www.flickr.com/people/47817874@N04">Gzooh</a> from France
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/47817874@N04/15778498544/">Too many questions</a>