[Tystnad]

If they are to make the games historically correct, they cant really include ghilliesuits in it, since that is a modern invention.
The earliest "Ghilliesuit" was a camuflage mask used by german snipers, Heer-snipers.
There is a skin out somewhere, called Heer-sniper, which has this early type of ghilliesuit on it.
Check it out, its as close as it gets.