What is this? Any Ideas?

[bniswonger]

Hello everyone here is a fun item for you to ponder over. I found this item in a box of old medical instruments. I am not sure what it does and there is a bustle of ideas around my shop as to what its used for. I am not sure if it is in fact a medical device but any ideas would help me out. Thanks and enjoy. Here is a link to the Pics.

http://www.facebook.com/media/set/?set=a.138271872927095.37554.137249466362669&type=1