That chest is for the .22 Cno7. EIS 3032 is the checklist for the Cno7.
The markings are the later amrkings applied by the military over the years.
The origional colour of the box would be a brown/olive. That is likely the colour of the interior of your box. The semi-gloss green is post war. On the side of the box where the CGB 7148 (which is the part no for the .22 chest) is, you can see another layer of markings underneath the paint just over the B2. These aren't the origional markings either...if you look under the word "chest" you will see a portion of the original markings.
You will see many ebay sellers claim that the Cdn army used these for sniper rifles. There is certainly no documentation for this claim. Even the most modern manuals in the CF still refer to the #15 chest for the snipers.
The little groove on top of the reatainers is for the .22 cleaning rod. There should be a little block of wood on the back wall (inside) for the brushes and the jag.
The box should contain:
1 Brush, bristle
1 Brush wire
1 Jag, 22 in
1 loop, .22 in cleaning rod
1 rod, cleaning, 22 cal cdn mk1
1 bottle, oil cmk5
and a sling, rifle, web, Cmk1
Oh, and of course, a rifle with one of the 4 available butts.
I opened it in hope, but unfortunately someone had removed the rifle and all the goodies...
Thanks for the info, very complete and interesting.