This is a vintage glass door knob and part of a brass Clinton lock with the cast iron door insert.
The glass knob (12 sided) has some damage on the backside of the front. Nothing shows on the front.
There are two keys and both operate the door lever. Dead bolt operates.
Front plate length: 8.25" Width: 3.5"
Glass knob is in good condition - lock hardware is incomplete. What is shown in the pictures is what you will receive.