Classic S&W. Pinned barrel, no frame-lock, shipped in 1973. Appears to have had a wide trigger and semi-bobbed hammer installed. Runs like clockwork and hasn't given me any issues. Doesn't appear to have had many rounds through it; bore and muzzle in perfect shape, very tight frame-cylinder gap. Looking to sell or trade. Will include 2 speedloaders and Tagua leather holster.