That spot looks off center Frogpatch,,don`t think these ever had casters,,unless the same spot appears on all the legs !! Do all the feet have the same spot ?? Are we looking at the same pic !! These look to be made after 1900, I have seen the same carving on other chairs !! A nice reproduction though !! In fact,,now that I think about it,, there was another chair posted here with almost the same carving a year or so back !! I am almost thinking late 30`s or early 40`s on these !! And that is about the same time the green felt started showing up,, if the felt is original !!