This is the stairway in a 1865 house that my cousin owns in bay city Michigan. About 15 min from where I live. Bay city back in the late 1800's was a major sawmill town because its on the Saginaw river and allowed easy transport of logs. Many fine old house around here.
I am going to restore the back porch he started on back to its original glory. Plus it's in the historic district and must match the same style.
I will get some pics of the inside next week. The inside is all original and the trim work is.....? I will let the pic say it. I never seen 5 piece rosettes on the casing .