Creagh-Osborne Air compass type 255, no.160, liquid compass with barrel shaped bowl and viewing windows to each side, with radium paint on compass, developed by Captain F.O. Creagh-Osborne, made by H. Hughes and Son Ltd., London, 1915-1933 Air compass
Creagh-Osborn type 5/16 liquid aircraft compass, used on scouting aircrafts during the First World War, also known as 'Quick Period' compass, patent no. 1148/15, developed by Captain F.O. Creagh-Osborne, made by Henry Hughes and Son Ltd., London, 1917-1919 'Quick Period' compass for scouting aircraft
Observer's air compass, patt.261, no.445, liquid compass for taking bearings with leather wrist strap and radium paint dials, developed by Captain F.O. Creagh-Osborne, England, 1914-1933 Air compass