Antique Crystal Glass Victorian Door Knobs & Mortice.  Sargent Brand stamped on the side..  The knob does slide back and forth, probably secured by the door.  The door guide that secures the door closed has a spring and does work.  Chippy  green paint, some rust; but, the the two knobs are fine. The knobs are 1 7/8" - 2" in diameter.  It will be wrapped, boxed, and placed in a flat rate USPS Bubble Envelope.