Frank,
(1) I own the identical gun, but dated 1907, and it also has bushed firing pins. In fact all my pre-'13 guns on R frames have the same pins. Likewise all my pre-13 "FW" small gauge Smiths do not have bushings, and date from 1907 to 1912.
(2) My 1907 2E has the second style stop, also.