To quote Daryl...I suppose one could NON-FACTORY alter the Infallible to automatic reset...

You're probably correct, the gunsmith who installed the single trigger on my Prussian Sauer was Otto Neubrand (double barrel patent # 2,092,850) ...I looked at it very carefully to see if it was some other model other than the 1912, it was not...the only difference was that the underside of the safety button had a small bar silver soldered to it that engaged the selector when the safety was moved (backward only)...there were no alterations to the trigger except the removal of the selector linkage, which was not necessary at all and may have been done by the previous owner Loren Smith (Colt author). Loren used the gun for skeet, and it was he who paid Otto to install the trigger. Years later I bought the gun from Loren.