Check to see if the iron is bent slightly, as I've seen the occasional bent fore iron strap; which is typically caused by someone trying to attach the iron with hammers in the fired position. With the Type II ejector design, this problem is more prevalent on the first variation (pictured above) with the round escutcheon secured by two screws, as the area where the strap is attached to the base is narrower. Later Type II ejector guns with the the "banjo" escutcheon have that base/strap area reinforced with additional metal; but it can still be bent with enough pressure.
And as to the shapes of the Smith escutcheon itself, David is correct as to normal standards; but on high-grade Smith guns it is not uncommon to see the forend escutcheon artfully and uniquely reshaped.
