The Cno7 chests were originally a somewhat pale olive green. Thru the 50s and 60s, the bulk of them were repainted the Canadiansemigloss olive green. I have a few minty samples of the original finish, and a larger number of them with the semi-gloss green. Most of the chests have the semigloss green, and also have the NSN and checklist number painted on them, indicating post 1963 service.
You can usually see the original colour inside the lid of the chest.