I was doing some research looking for a clone of Red Seal Ale, when I came across an old thread on the green boards where someone mentioned North Coast got their strain from the yeast bank at UC Davis (my alma mater). The same thread mentioned that a North Coast brewer took it to Brewtek and that it became CL50. Brewtek CL50 = Wyeast 1450, so I figure there is a very good chance that 1450 is North Coast's house strain - for their American style beers, anyway.