The gilt verge fusee movement is signed "Wm Sharp London 9979". The cock's 90-degree pierced foot and the pierced sideplate, along with the square pillars and the large minute numbers on the face, all point to a 1760s date. A crack and small chip on the face. Small chips to the crystal. Gilt hands. The inner case has a rough repair to the hinge.
No known William Sharp working in London in this time period.