Thanks for the details of the markings. I was wondering when the colour change, changed over from the normal varnish shellac finish to green with yellow markings, i suspect this would happen to other motar rounds such as the 3" mortars. Although my 2" is an early 1960's dated round I wondered if such rounds could be labled rather than painted, just for a breif period during its history?
I think (in the absence of JSP316!!) that the deep bronze green overall colour and the hazard bands were introduced in the 1960s to meet NATO standards. At some stage the hazard bands gave way to the hazard being indicated by the colour of the font but this was not always successful eg brown (for low explosive) on a blue (practice ground). I am not sure about the use of labels in lieu of stencilling/silk screening, I have seen labels on exhibition items but I dont expect they would pass muster from a QA point of view for an operational store.
I found a picture of the other side:-
