Baldwin 5455.030.LDM Wave Left Hand Dummy Lever Set, Polished Brass
Baldwin Wave Left Hand Dummy Lever Set, Polished Brass #5455.030.LDM.  Single left dummy lever.  A single lever for a non-latching door.  Half dummy is only used on outside of the door.  Most commonly used for a push/pull application or on a closet door that does not have a latch.