The Movement
The case will be built around the movement. The critical dimensions are shown below. The majority of them were measured with a tape measure. Not exact, but sufficient for this exercise.
Face Width
- 2(Hand shaft to edge of lever): 2(6 7/16") = 12 7/8"
- Movement width: 7 7/8"
- Hand width: 2(4 3/4") = 9 1/2"
Use a 14" wide face (Case ID). For reference, Hermle 1161-853 round dials are 13" wide, with a 11" diameter timetrack. This will yield a total width of 14" + 1" + 1" = 16".
Face Height
- Hand shaft to top of chime block: 10" - 2 13/16" = 7 3/16"
WIthout making the face wider, the face is not going to be able to be square. We should also give ourselves some room in the top depending on the angle of the chime rods. Therefore, go with 7 3/4" on top, and 7" on bottom. Use a 14 3/4" tall face.
Case Depth
The depth of the case, neglecting the door. The slimmer the profile the better. The door will add about 1"
- Tip of winding shaft to back of hammer: 1 1/2" + 1 7/16" + 4 1/4" = 7 3/16"
- Back of hammer to back of chimes: 5/8"
- Minimum depth: 7 13/16"
Use 9" deep case.
Case Height
- Face: 14 3/4"
- Bottom for square: 14"
Use 78" tall case. This was determined based on the space.