Not sure how old I don't see any markings on it. It works great though! It was on the front door when we bought our house and the wife said it had to go cuz it was annoying!! lol
Sorry but it just went up last week it's now $5.20 that's what it will cost to ship it to you! If you don't like the change call your local post office and complain and don't bid!
i've seen these before. usually mounted in the center of the door. to install make a template of the the holes then drill the holes and mount one piece on either side. takes 2 people. my house is pre revolution, would look great.!!