test-
... just to see if I can figure out how to post a pic...
well that didn't work =S
[IMG]http://geekhack.org/attachment.php?attachmentid=3927&d=1250843768[IMG]
It's easy once you know how to do it though.
Speaking of mechanical calculators, I love this one, the Curta (http://www.vcalc.net/cu-hga.htm):Show Image(http://www.vcalc.net/HGACurta/Image15-548x768.jpg)
Expensive, unfortunately.