a few more things i noticed... it has the serial number stamped on the back end of the cylinder,,, it has 56 and an L stamped on the frame under the grips at the bottom of the butt on the side... the last digit of the serial number on the butt is spaced out like it was added later or somthing...

K 1366X X

and 15230 is stamped on the frame on the inside where the arm that swings the cylinder out covers up...