This is a Pratt Ware Pot Lid complete with Base titled No. 340 On Guard
A lid in medium size only, produced by F. & R. Pratt, c.1860, but many later issues are seen. This slightly later issue shows the dog under the seat versus the bucket.
All around good condition for its age. Base has definite crazing but the lid is in fantastic condition minus the small chip shown in pictures on the underside.