OD;
I only have one in the early range, a 10ga E grade, SN 10,515. It has bushed firing pins & a smooth concave rib. My next jumps to 20,633 A 12ga G grade. Also is full pistol grip with the guard tang extending all the way down to grip cap. Neither it nor any of my higher #'d guns have bushed firing pins & all have the flat engine turned rib. Am operating from memory right now, but seem to recall the 1889 catalog describes the engine turned rib, but don't recall if firing pin bushings are mentioned or not.
