Jersey 1940 Swastika opt on Great Britain KG6 11d plum - a copy of the overprint on a genuine stamp

Jersey 1940 Swastika opt on Great Britain KG6 11d plum - a copy of the overprint on a genuine stamp with forgery handstamped on the back, unmounted mint in presentation folder.  Note this value was not available in 1940 but is included here for interest.