Can anyone Identify this Vise?!?!

[Twism108]

Hello all I have searched high and low, emailed experts and asked the stars and I can't find anything to identify this vise and no one else has any awnsers either. I hope im posting in the correct section, this is only my second post. I bought an old workbench and the vise was bolted to the bench. The color is just a primer I used after I cleaned it up. For all I know it could be from China but I hope to figure it out with your help. The markings on one side is in a symbol with PATD stamped, the other side has a G stamped, than the numbers you see are on the bottom. Thanks!!

 

[JZiggy]

It is definitely a pre 1950's make. Could be Erie Tool Works -- I have one a lot like it

I have also seen that logo before and I think it is called "Keystone."

 

[bl00]

It's a Hollands.

 

[Twism108]

Awsome thanks guys!! Here it is on the advertisement on the top left.