True, there were some standard abreviations which may or not be used. MT 5-2 PTR would mean Five inch Mount #2, Pointer. REP-2 LKR LDR would mean Repair Locker 2 Locker Leader. These markings were mostly so that the helmets got back to their correct station, and the same guy got the same helmet each time. Some times there may be a rate and name on them, just depended on how much effort someone wanted to put into them.
Senior Chief Signalman
could you tell me what 1-DIV means ?