Fashion Wagon

A vintage flannel caught my eye this afternoon while taking a break from work and strolling into the Wise Buys thrift store in Bellingham, Wash. I was shocked to see “Duluth, Minnesota” on the tag. Does anyone know where this was located? I have never heard of it before.  

A quick Google search shows the trademark was registered around 1960 and expired in 1987.

My arms are still itching from trying the shirt on.