technique – Photo Chromography – Stack Exchange

I have an old photo of a woman who is in a very thick beveled glass and on the back, she is printed with "Photo Chromography", it's an advertisement that says it's the most recent discovery of photographic science that a life similar to that of reproduction can be made. Upload any photo or type of tin in color. They are all made on this flat glass and sold with a beautiful metal easel at $ 1.50 each and your original photo will be sent back to you. From the new Photo Co.

First, I do not find the word Chromography only on chromatography. I would really like to know when this process was used so that I could get an idea of ​​its age. The image of the woman is at the time of the American Civil War, but she could have used any photo from the era for advertising purposes.