Antique Chinese Clay bark like tea pot, lizzard on top stamped CALIGRAPHY ^^

Antique Chinese bark like tea pot, gorgeous, excellent condition, some light surface scratches commensurate with age7" tall by 10" spout to handle, an extraordinaby piece, marked on back, i cannot say who made it, from an old estate. Any information in the mark would be greatly appreciated [outbackrack5tp6]