i have an H grade 12 ga lefever with twist bbls with two SN's on it. The numbers are 4 digits apart @ #73,338 & #73,342, both extremely high numbers for a Lefever. It is marked H on both the bbls & frame, has cocking indicators & Doll's Head as well as late H scroll engravig. Wood looks like DS wood. forend is plain without metal tip or belly escutcheon, stock has uncapped round knob half pistol grip. it is equipped with an Infallible SST. It appears to be a last ditch scrounging of parts to assemble a gun. I have been told that Ithaca did use some Infallible triggers in this era but to my knowledge Lefever never did. I do not know if the but plate is original or not. It has a large V design in it, with a narrow strip of cross lines a ways down from the top, then a plain concave shaped band & then a wider strip of cross lines below the band. I have no idea who made this plate, whether it was a regular gunmakers plate or an aftermarket. This gun does not have any of the normal markings associated with manufacture at Ithaca other than the grade marking on both bbls & frame, but I can only assume it was assembled there. When it come to Lefever there just aren't many Hard & Fast Rules.