I'm from Rush City, moved to Southern MN a few years ago.
The Anderson Bros. were also cattle buyers/sellers (some use the term jockies)"Pine City Livestock Sales".
They also sold MM for a short time thru their Pine City Location, as a satellite of Harris, which was the main location. I have seen MM advertising, listing only Harris, and also listing both Harris & P.C. I think they sold the MM dealer to Don Wilcox in 1948 or 49. in the later years it went by Wayside Implement, they also sold the New Holland line.
As I recall, there is a photo of the dealer in the 1940's in the Harris Centennial book that was published about 1984, it would be available thru the Library exchange, I think both Rush City & No. Branch have copies.