jokester all the 3band NYS RB'S I have seen' in thats 2 others are marked like mine. B on the left side of the receiver S left side of the barrel P right side of the barrel H above the the lug on the barrel for the forearm stock last pattern date 1874 S/N 13563 just never seen a NYS with the numbers stamped like that and mine is second gen build from what I understand.