Interesting David, I've only collected pre-13 Smiths; and all those I've owned with single triggers had manual safeties. The "R" frame on that Specialty has obviously received some special attention, as it has been lightened with extra cuts in the cocking rod channels; perhaps someone also ordered the gun be modified for an automatic safety? By the way, I haven't done autopsy's on nearly as many Smith guns as have you; but on a two-trigger Smith gun, isn't the top tang milled out on the right side to accept the safety slide bar? This example shows the slide bar on the left side of the top tang? Is this the only HOT equipped Smith gun you've seen with an automatic safety?