Stallones, your trigger doesn't seem to resemble the Infallible single selective trigger, but I have not seen one like yours. Is your trigger non selective ?

Eightbore, do you know of anyone seeing the Pecks Bad Boy Parker high grade hammer gun with the Infallible single [selective?] trigger ? It was presented to Geo. Peck in Sept. of 1884 and equiped with an Infallible trigger on May 28, 1913. Gun has a large presentation circle shaped plate on the right side of the buttstock.

http://www.bakercollectors.com/