WW2 AM 1940s RAF Air Ministry P10 Compass in Box. 

Untested, Appears to work ok ? but would need calibration, the only thing I have done is replace the 2 hinges with identical size & shape

Please consider as Untested

P&P is for UK mainland only, payment by Paypal if posting or cash on collection from OX14 (Abingdon) 

Mob # 0044 (0) 7759-716787