I picked up this clock at an estate auction. It’s in great shape for its age, with only a few minor surface scratches.  Allso, It comes with a wall-mounted plate.  To open the face, I used a 7/32 sock wrench.   Check out the photos for more details and anything I might have overlooked.  To avoid any damages, I didn't use any sock wrenches to wind the clock.   The original key is not included.