I'm looking to purchase old changeable bit keys, either the more common style ones or ideally less common ones like the ones made by Goffin or McGreger. I'm also looking to purchase detachable bit keys and any other 1800's safe and vault keys (like Lillie or Diss's). Please reply or send me a message if you have any for sale and to discuss the price. I'd love to add some more to my collection!