There is a similar one in the museum of 1st Gymnasium of Chios.

More informations:

http://en.wikipedia.org/wiki/Heron%27s_fountain

http://www.google.gr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CCwQF...

http://26lyk-athin.att.sch.gr/autosch/joomla15/images/projects12_13/hrwn...