What is the gross vehicle weight of a 1962 Miley Mustang Horse Trailer?

The horse trailer is a 1962 Miley Mustang 2 Horse Straight Load Bumper pull with removeable divider and storage under the manger. I'm selling mine and they have asked what the gross vehicle weight is, but the title is in a box somewhere and I don't even know if the weight would be on that title.