Unknown electric impact wrench

[garagejunkie24]

This was my grandfathers and I'm not sure what brand/type of impact wrench it is. I don't believe that it is old enough to be "vintage". Has anyone seen one of these before??

The only thing I can make out on the top is what I believe is G.W Murphy Industries and a SP with a circle around it in the top right corner.

 

[evanbaker08]

It looks like it says porter electric tools.

 

[Traule]

That's a Porter Electric Impact

 

[kwoswalt99]

It's a Portable Electric Tools brand, made by G. W. Industries

 

[kwoswalt99]

I'd call it vintage, but it doesn't meet the modern definition of "antique"

 

[notlob]

It's a Portable Electric Tools brand, made by G. W. Industries

http://vintagemachinery.org/mfgindex/detail.aspx?id=1104