Demonstration doorlock on stand Demonstration doorlock on stand Object Number: 1972-298/1 type: doorlock Image © The Board of Trustees of the Science Museum
Security key Security key Object Number: 1972-298/2 type: key Image © The Board of Trustees of the Science Museum
Stand for security lock Stand for security lock Object Number: 1972-298/3 type: stand Image © The Board of Trustees of the Science Museum