MELGAR posted:These are pictures of very early locomotives, probably around 1850 with primitive photography. I think the embossments are likely to make them authentic, but I am not an expert. The round builder's plates and the Baldwin embossments are not just a coincidence in my opinion. You might also consult someone at the Railway and Locomotive Historical Society in your area or near Philadelphia.
MELGAR
These are not "very early locomotives," and are most definitely NOT 1850s locomotives. These are clearly almost all from the 1870s, if not the early 1880s.
That last photo is a C-16 from the Denver & Rio Grande, "Silver Cliff," built in 1879.