Here’s a vintage stereoview of Chief Standing Buffalo (although he’s not standing in this image) from 1871. This is a perfect example of what I was just discussing in the comments on the last post – this is a copy stereoview of an original. You can tell this is a copy by the overall lack of sharpness and contrast, and by the fact that the card is completely unlabeled as to subject or photographer. An original card from the original photographer would fetch something 6-10 times what I paid for this one.
Here is a scan from a 2008 auction catalog of the original stereoview, by Hamilton & Hoyt. Notice the difference in quality.