My collecting interest has been Upper Midwestern-made guns, for the past 45+ years. My in depth study has been on Illinois makers (published author on the subject), but I have seen many Wisconsin-made rifles, and have owned a few. The ones I have owned were by W. H. Calvert, Beloit; A. P. Hyatt, New London; W. H. Hyatt, Winneconne & Waukau; O. F. Brooks; Janesville; John Meunier, Milwaukee; and L. G. Bever, Portage. I probably have photos of several of them. They were all well made rifles with some style, not just utilitarian guns. There were a number of Wisconsin makers who also worked in Illinois and Iowa at various times.
I was at the last Rock Island Auction Company Regional Auction, and there were indeed a number of Wisconsin made rifles there. There were about 8 Spangler rifles, but others as well, probably between 15 and 20 altogether. I came away with two Illinois-made rifles.