Antique Platform Rockers

I have two platform rockers that came from my Prussian great-grandmother. According to my mother, the small cherry rocker was acquired in WI approx. 1897 - 1905 and my great-grandparents brought the other rocker with them in 1887 when they immigrated to the US from Germany. No identification or makers mark that I can find; however, my mom did refinish and reupholster (she said the larger chair was filled with horse hair).