The worst that I have ever seen is at a local museum here in Ontario that more or less resembles a pine tree drawn by a kindergarten student at best.
Not sure if they ever changed it but God awful comes to mind...
It always amazes me at the amount of time, money and effort guys will spend to create a beautiful restoration only to wreck it with crappy and incorrect markings...
BTW, I just happen to know where there is a stash of NOS water transfer decals available. I believe they are 5 Div.