Hi Melgar, yes, the photos are public domain from Boston Public library.
Source Site: fish pier / Collection:Leslie Jones Collection / Institution:Boston Public Library - Digital Commonwealth Search Results
I agree your model, while very nicely detailed, looks a little out of scale. If we could find a source for wheels I think the rest could be scratchbuilt.
I am slowly working on a large section of the layout modeling Boston, including the Union Freight RR and South Station. I have tons of historic public domain photos covering far more than I could ever model. I have also been referencing John Pryke's excellent book on modeling Boston.