SS Thistlegorms cargo was destined for Alexandria, A major Royal Navy base. Also building up in that area the RAF desert air force and the desert Army. Along with the flegling specialist forces being developed for that Theatre of Operations, that would eventualy be used all over the world. Probable questions to be answered, Are they made from Ferrous or Non Ferrous metal, what is the flat large end cover made from, are they mounting brackets part way down the cone, what is the small side hole for, are they water proof electrical connections on the side of the square end, does the item inside of the square end fold out? Just some food for thought.