| Period | 12 hours position at normal temperature and 4hours in each position at -20C |
| Position | Dial horizontal and vertical |
| Temperature | -20C and normal |
| Permissable errors |
At normal temperature 30 seconds in 24 hours At -20C - 15 seconds in 4 hours |
Source: A705, 150/4/1831
Further details can be found on Aircraft Clocks of the World or directly at G6A/1002