Thanks- you are right- I have a 12 3E and two 12 2E-s the other 12's are either OO or field grade- and you are 100% right about the engraving on the machine screw head that connects the lock plates- and not on the rear trigger plate to top tang screw head, as that is covered up by the trigger guard bow when it is assembled- Also, just FYI-- learned that "usually" with the caveat from years of whatever in life-observation maybe- the pre-1913 Smiths had the two top and bottom rib 'dimples" at the muzzles only on Grades 2 and higher- I bought a nice 'using 12 OO R frame a few months ago at a gun show- 28" M&F, DT, two piece top tang strap, original stock, BP, screws- clean-and the Armor steel barrels read dead nutz at 28" on my Stanley tape rule-- but no 'dimples"-- also a later OO grade, no bushed firing pins (those bushings are a RPA- IMO anyway) the second "torpedo shaped" firing pins- easily removed by removal of the lock plates- and slide out--I find Smiths very easy to work on- assemble and re-assemble easily for me- you can dry fire and recock the action without the barrels and forearm (having the special curved tool to recock the axles helps- the only "Achilles heel' is the expensive repair or replacement of the buttstock if you get cracks in the rear apex of the lock plates- and also the splinter forearm-s very little "meat" around the two wood screws that hold the forearm iron into place at the anvil area-
