I called this lady “the hat lady” when sorting through my CdV collection because of all the CdVs I have, I have very few of women in hats. Aside from the hat, she also has a delicate bar pin and some kind of puffy thing, as well as at least a dozen buttons but probably more like 15-18. The photographer was Oleson of 226 & 228 Washington Ave. South, Minneapolis, MN.
UPDATE: from Far Side of Fifty, the Oleson studio was in operation from 1887 to 1889, so we can comfortably date this photo in that range. Thanks!!
Who Were They? 
Oh this is a great CdV..I love her hat! Here is some info on the Oleson Studio.
Address: 228 Washington Avenue South, Minneapolis, Minnesota
Dates of operation: 1887-1889
Address: 226 Washington Avenue South, Minneapolis, Minnesota
Decades Worked in Minnesota: 1870s; 1880s; 1890s
John Oleson died in 1881, his wife Anna took over his business, she remarried in 1889 and her new husband took over. So I bet your CdV is from 1887 to 1889. :)
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Wowsers. I pity anyone with arthritis trying to do all those buttons. She seems to have a good complexion – Its a shame there is hardly anyway to determine who she might be…
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