This is visible in the photos. The other problem is the brass guide bar and its tightening thumbscrew are missing. This is the brass bar piece that runs along the hinge on the underside of the plane. In the photos you can see the two mortise holes that this would fit into, and the handle-end view of the plane shows the hole where the missing brass thumbscrew (similar to the three seen on the top of the plane) should be.
Aside from that, all of the other parts are present and everything moves freely. Again, please see the photos for the best sense of the condition.
If you would like more photos of specifics parts, just let me know and I'll post them. Tidey Double Bevel Plane Patd 1854 Rarest 19th c.Woodworking Tool" is in sale since Sunday, December 10, 2017. This item is in the category "Collectibles\Tools, Hardware & Locks\Tools\Carpentry, Woodworking\Planes".
The seller is "astral66" and is located in Edinboro, Pennsylvania. This item can be shipped to United States.