Researcher could be right on the dates. I have had two A Grades with the Infallible trigger. Did not look up the dates of that trigger, but in the back of my head, thought patent dates stamped on the trigger were a bit earlier than 1912.
Tom, the forend "cocking stud" was changed into the one like your later gun somewhere around 1907 , give or take a year.
A later look in my files finds that the first patent for the trigger is in 1906 and refinements in the trigger in 1908 and later. It then appears that the A Grade was made in a time when the Infallible trigger could have been factory supplied. Usually the Infallible trigger had patent dates stamped on it's sides, inside the gun. The question "factory installation" or not could be resolved by viewing these dates.
Last edited by Daryl Hallquist; 12/20/10 05:44 PM.