1943 dated, brown bakelite shaving brush containing an MI9 escape compass.
On the base of the brush there is a war department arrow and the manufacturers name - lenc, plus a 1943 date. Unscrewing this base from the brush, reveals an escape compass fixed into it. Originally, this would have had a shaving soap stick covering, so concealing it.
The brush is in a very good used condition. The compass is in a working condition but it has a crack in the glass (see photos).
For further reading on the brush and other escape items, see Phil Froom's excellent book, Evasion and Escape devices (see last photo).