A K Masterpiece with the wide hammer and trigger (.500") would sometimes be referred to on the box label as a Target gun, but they were not officially referred to as such as Target Masterpieces. No confusion there
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Should you want to advance to the next stage of your addiction (uh, collection):
Also, the books Smith & Wesson 1857-1945 by Neal and Jinks, and History of Smith & Wesson by Jinks. Happy hunting!