Photo Number 180

Sisters?  Perhaps. Friends?  Maybe.   This came from the Antique Shop in Park Rapids, Minnesota. I will guess that this is from the late 1880's.. they almost have bangs..the dresses or blouses seem to be heavily pleated in the front.
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Update from Norkio: 
Big plaids like that also tell us this lady had some means, as matching plaids on a dress required extra fabric. The sleeves with their puffed shoulders are fairly typical of the late 1880s to 1890s.