No Marks, automatic wrench

[gregguy]

Any information would be great.   Type, history, age. manufacturer

[gregguy]

Sorry the picture is so bad.
The site seems to only allow 250K which by definition make for a bad picture.

[Lewill2]

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.

[Yadda]

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.