Enjoying the thread. A "timeless" photograph is one which could span years or eras and depicts a subject that is synonymous with something valued and valuable about, in this case, a piece of Americana. Whether or not the photographs were made during the steam era is irrelevant to me. The photos depict classic steam era images. They may be re-enactments or "show piece" machinery but, once again, it is the feeling of the image that makes it for me. I don't care if it is period correct to the last rivet.
My contribution