I picked up a couple of tools this weekend at local garage sales, and I think this one is a early water pump wrench. From what I was able to find on the internet, BluePoint was made by Snap-on. Does the place of manufacturing, (Kenosha, Wis.) help date it?
Mel
(http://img.photobucket.com/albums/v671/lugnut/Tools%20for%20Tool%20Talk/IMG_1117.jpg)
(http://img.photobucket.com/albums/v671/lugnut/Tools%20for%20Tool%20Talk/IMG_1124.jpg)
That reissued patent was issued in 1929. Found similar wrench in early 30's catalog with pat appl on it. Info is probably available in (Collecting Snap-On site) but I ran out of time.