Ratings can be on the rim perimeter as well.
I found the link below from an Italian aftermarket wheel manufacturer. The page highlighted shows where rim markings may also be found, that is on the rim perimeter, often the visible side. In Japan, apparently that is where the authorities like to see at least some of the markings.
It also appears that the markings will only be found on what might be called quality rims that would be marked into the EU or Japan as both have marking requirements, and apparently enforce them. I guess that is why any OEM Land Rover rim without at least some markings would surprise me. As to kg load rating, there is the thought that without a load rating, the rim is deemed good for some minimum number.
What this really means is that here in North America, as long as it is near round, a wheel can be legally sold with no markings at all, or to accommodate all manufacturers and retailers, misleading markings.
As to if the wheels can be safely or legally mounted on a vehicle, that is between the vehicle owner, his insurance company and any governing authority, (if there is one), usually after the accident.
Oz Racing - Technology - Wheels - MARKING