Traditional Victorian Old Style Brass Door Bell - from a time when we had to go to the door to answer it. Nowadays, it is possible to release the door from another room at your home or office, with the correct product of course.
Home owner said, "This is one of the door knobs that leads into our master bedroom. We love to purchase our door knobs from Anthropologie. We've put a different knob on each door. We think it gives each room a special touch as you enter." Love this knob!