Hat in 1910 Photo

I wonder if my grandmother purchased her hat in this Millinery parlor in Rockford Illinois which had an ad in her 1906 high school yearbook.

I found this information (503?) on the store and there’s a photo but I don’t have permission to post it. It’s worth seeing but you’d have to Click this link to see “Photograph depicting Eckholm Hats at 503 E. State Street. This millinery shop was owned and operated by the Eckholm sisters, Ester M. and Sophie T. The woman standing in the doorway is probably one of the sisters but is unidentified.”