![Carrying case for R.A.F. aperiodic air compass](https://coimages.sciencemuseumgroup.org.uk/300/981/large_smg00063670.jpg)
Carrying case for R.A.F. aperiodic air compass
Carrying case for aperiodic R.A.F. air compass, type P 7, with grid view system viewed in reflection from mirror. Unknown maker, Europe, 1918-1939.
Aperiodic R.A.F. air compass, type P 7, with grid view system viewed in reflection from mirror. Unknown maker, Europe, 1918-1939.
Carrying case for aperiodic R.A.F. air compass, type P 7, with grid view system viewed in reflection from mirror. Unknown maker, Europe, 1918-1939.
R.A.F. aperiodic air compass