I just stumbled across this lovely cover for sale, and I am wondering if someone can provide insight as to whether this is an actual cancel as a result of something going through the mail, or if it is just something that was created at Colonial Williamsburg and not actually postally used.

I can tell that the cancel has been partially penciled in - I'm okay with that. I'm not concerned about the value of the piece. The reason why I ask is because of my personal collection criteria, trying to be concise, and general curiosity.
Thank you in advance,
Christopher