Smoke box markings on P59

[Dado]

HI. I can't find a photo of the marking for Smoke Box in the 25 pdr TNT of the P59 metal box. The A (Aluminum) on the green disk... can anyone help me?

B Bakelite

 

[pedro]

what era? WWI, Post45, Post48, Post 64 ?.. this image from 1948

 

[Dado]

ww2