As Andy says the first one is official and is later. It was designed in 1947 (have to confirm this).
Hi Norman,
so, this varient became the official sectioned gren for training purposes?
Mine has the cut sectioned part of the gren wall painted blue with the centre tube green. I thought the cut areas should be red?
The filling is some sort of hardened shiny brown plastic and the lever is ROF[P]. Base plug again ROF [P] dated 1971. Has some white lettering down one side but too worn to read. Its in very good condition too.
Andy