Something is odd about that one. I own and have owned many #704 Proto 4 inch adjustable wrenches, but none have looked like that one. The newer ones appear to have been made by Crescent ool company. I have a friend the has a Plomb/Proto 4 inch lawsuit model and it also looks nothing like the one that just sold. Dig out your 4 inchers and compare to the one on Ebay.
EvilDr235