Hi Schloaty,
CH stands for Confederatio Helvetica (Latin name used internationally with the initials only CH) , that is Switzerland (please note: not Sweden, as some Americans have already mixed up both when chatting with me!).
Why Latin nowadays ? Well there are three official languages in Switzerland, so for nobody to be jealous or feel superior, Latin was chosen (also on coins, notes, passports...)
Native neps seldom have a CH label on them, tho !
Cheers,
Olivier