Type E-6B, Stores ref. 6B/148. By Stanley Manufacturing Co. Ltd. (S.M. Co.) 1935 copyright. White metal disc scales for height and airspeed computations; rotating disc with compass points to front and sliding persex 'graph paper'. With card protractor. Broad arrow and RCAF marked and in very good used condition. With leather issue case marked A.M. Co. Canada. Stock code M18658.