The old bikes in Thailand often do not have a green book as they were imported before that kind of paperwork started. And then there was a grace period where the Thai government allowed all these old bike owners to apply for the new kind of registration. Many people never did it and so now we have so many old bikes in Thailand that can never be registered (like that one in the photo) And while it's ok to have as a collector piece it's not safe to ride it because no insurance or registration and the corrupt Thai police will just take it and keep it! :(