Winston was a marketer, not a manufacturer. They bought batches of instruments with their name stenciled on from various factories around the world; some from Brazil, some from the Czech Republic, but by far, most from Taiwan or the PRC. (I was contracted to make a parts catalog for Winston in 2006, and it was frustrating because they used the same model number for some instruments that didn't share a single part.) Every Winston baritone I've seen came from the same factory, I think in Taiwan, and I always thought they were very good horns for the price. I don't see any reason why someone would make a "knockoff" Winston; they were already knockoffs, more or less.