With mouth open wrenches are called alligators, what are they called with a closed end?
(http://farm8.staticflickr.com/7296/8960423051_fa891548a2_m.jpg) (http://www.flickr.com/photos/skipskip/8960423051/)
JUN 060 (http://www.flickr.com/photos/skipskip/8960423051/) by skipskip (http://www.flickr.com/people/skipskip/), on Flickr
Says "Diamond" , it's actually a well made tool.
That one is a horseshoe calk wrench.
Makes sense, it came from a shop that was a smiths years ago.