Any information would be great. Type, history, age. manufacturer
Sorry the picture is so bad.
The site seems to only allow 250K which by definition make for a bad picture.
This style wrench has been manufactured by multiple companies in multiple countries over the years. The unmarked versions are difficult to identify as to a country of origin or manufacturer.
http://www.datamp.org/patents/displayPatent.php?pn=D48996&id=30746
If it isn't marked there isn't much you can do, but the patent above is where they got the idea.