unidentified plane

I've had this plane for a some time now and have never gotten it to work very well.  A a few days ago I just felt like farting around in the shop so I took it out and gave it some effort to get it tuned up. Unfortunately it was to no avail.  I smoothed out all the contacting surfaces and toyed around with all the possible adjustments but no matter what the blade won't rest fully flush with the top surface of the frog.  Patrick's Blood and Gore was informative and brought up the fact that there were a great deal of imitations of the genuine Stanley original.  The casting and subsequent machining of the mating surfaces seems inferior to other Bailey planes I've got.  You can see in some of the pictures that even after sanding there is still some "pitted" looking sections where the paint remains. However there is no rust or evidence of rust.  The paint on all the metal parts is in good condition but again seems low quality and rough. The big question is whether or not this is the real deal or a knock off that will be infinitely frustrating to get in fine work condition?  What marking, if any, would I expect to see on a Stanley of this style? It measures 8in long by just over 2.5 in at its widest.