For sale here is a Star Wars Vintage Dosimeter Imperial Code Cylinder. The rubber bottom and brass clip are reproductions but the rest is the real McCoy! In the 1960’s a company by the name of RA Stephen & Company Ltd, England, UK, made Radiation Dosimeters, that would end up being the props used in Star Wars for the Imperial Officers. The ones used in Star Wars are called direct reading pocket ionization dosimeters.  They were typically the size and shape of a fountain pin at that time. Star Wars Imperial Code Cylinders were devices programmed to give the Empire a detailed knowledge base of its serviceman’s actions. The Imperial computer network recorded detailed information of every cylinder’s activity, including every time sensitive files were accessed or high-security areas were entered.  Both the Imperial and Rebel Alliance used Code Cylinders to record information. This one is in excellent condition. Please contact me for any questions. Thanks!