The trailer is obviously "store bought" so it's really hard for me to believe there's no serial number on it, but I have looked. I have looked three times and asked three other people to look, thinking maybe I'm just blind. There is a white tag on the side of the tongue, it looks like there used to be writing on it but it is long since faded to nothing. I'm not making any headway yet, but I'll gnaw this bone a little longer before I give up on it.

David