I was always under the impression that if a chiefs .38 had adjustable target sights it was a model 50 and would be stamped as such, Now I see a "Model 36 Target" on the Rock Island Auction site, The S&W model 50 is on my short list, or at least I thought. Maybe I really want the M-36 Target? Is there a difference, They claim there were only 1740 Model 36 Targets manufactured. I see S&W lists a model 50 ???