Metal bar key. The age is unknown, but it's been maintained, so it's reasonably clean. Please check the condition and size in the photos. If you have any questions, please comment before purchasing. All items are available for immediate purchase, but we may also list them on other sites, so we may delete the page without notice. Thank you for your understanding. We offer a small discount for multiple purchases. Thank you. #Antique #Vintage #Americana #BlankKey #BarKey