Perpetual calendar
| Type: | Perpetual calendar |
| Geometry: | Circular, concentric |
| Repeats: | 1 times |
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| UL: | Upper left quadrant (inside circular scales) (UL) |
| UR: | Upper right quadrant (inside circular scales) (UR) |