<p>Photo of the streamlined locomotive Aeolus (#4000) at the head of the Denver Zephyr. The photo was taken by noted railroad photographer <a href="https://en.wikipedia.org/wiki/Otto_Perry" class="extiw" title="en:Otto Perry">en:Otto Perry</a>.  Perry earned his living as a mailman in Denver; photographing trains was a hobby he pursued for many years.  Perry was also known to travel outside of the Denver area to photograph trains.
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Like many other railfans who take photos, Perry had prints made up as postcards and used a ink stamp to identify their work as these photos were shared with others who also had a hobby of photographing trains.
Photographer-Otto C, Perry, Denver, Colorado
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