Used to work for MoD in the 60's on the avionics side, not a term that was is use then, and can still remember going to stores with a requisition chit for some item and being given a small cardboard box in which the wanted item was enclosed. Each one was carefully labelled, including the packing date which could be amusing, and had a notice stating 'Not To Be Opened Until Required For Use' and the box was sealed with brown paper tape. Once inside there were layers of various protective wrappings and within these was the component, sometimes nothing more than a large resistor or something similar.
The stores had a classification system with 10R for resistors, 10CV for valves, 10H for chokes, 10C for capacitors etc.If the item had been classified as 'Valuable or Attractive' then the old part had to be exchanged with the order chit. At times, if we wanted to build up our local stock of a particular item, we used to present the storeman with part of the unit with some other odds n ends. This worked for a bit but they soon got wise to it; replace a file and you had to present the tang end the blade was not accepted, CRTs they would after a while only accept the base and complete with the gun and deflection assembly we couldn't get away the the just the glass envelope and a few odds n sods thrown in for good measure Even the toilet paper which was more like an abrasive paper was marked 'Government Property' on each sheet.
Happy days, well some of them.
Cheers
Martin